5,619 Matching Results

Search Results

Advanced search parameters have been applied.

An in situ survey of Clean Slate 1, 2, and 3, Tonopah Test Range, Central Nevada. Date of survey: September--November 1993

Description: A ground-based in situ radiological survey was conducted downwind of the Clean Slate 1, 2, and 3 nuclear safety test sites at the Tonopah Test Range in central Nevada from September through November 1993. The purpose of the study was to corroborate the americium-241 ({sup 241}Am) soil concentrations that were derived from the aerial radiological survey of the Clean Slate areas, which was conducted from August through October 1993. The presence of {sup 241}Am was detected at 140 of the 190 locations, with unrecoverable or lost data accounting for fifteen (15) of the sampling points. Good agreement was obtained between the aerial and in situ results.
Date: August 1, 1995
Partner: UNT Libraries Government Documents Department

Small Sample Properties of an Adaptive Filter with Application to Low Volume Statistical Process Control

Description: In many manufacturing environments such as the nuclear weapons complex, emphasis has shifted from the regular production and delivery of large orders to infrequent small orders. However, the challenge to maintain the same high quality and reliability standards while building much smaller lot sizes remains. To meet this challenge, specific areas need more attention, including fast and on-target process start-up, low volume statistical process control, process characterization with small experiments, and estimating reliability given few actual performance tests of the product. In this paper we address the issue of low volume statistical process control. We investigate an adaptive filtering approach to process monitoring with a relatively short time series of autocorrelated data. The emphasis is on estimation and minimization of mean squared error rather than the traditional hypothesis testing and run length analyses associated with process control charting. We develop an adaptive filtering technique that assumes initial process parameters are unknown, and updates the parameters as more data become available. Using simulation techniques, we study the data requirements (the length of a time series of autocorrelated data) necessary to adequately estimate process parameters. We show that far fewer data values are needed than is typically recommended for process control applications. We also demonstrate the techniques with a case study from the nuclear weapons manufacturing complex.
Date: September 1, 1999
Partner: UNT Libraries Government Documents Department

Advanced Recovery and Integrated Extraction System (ARIES) Fiscal Year 1996 Annual Report

Description: President Clinton issued Nonprolferation and Export Control Policy in September 1993 in response to the growing threat of nuclear proliferation. Four months later, in January 1994, President Clinton and Russia's President Yeltsin issued a Joint Statement Between the United States and Russia on Nonprollfieration of Weapons of Mass Destruction and the Means of Their Delivery. President Clinton announced on 1 March 1995, that approximately 200 metric tons of US- origin weapons-usable fissile materials had been declared surplus to US defense needs. The Advanced Recovery and Integrated Extraction System (ARIES) Demonstration Project is one part of the scientific response to President Clinton's promise to reduce the nuclear weapons stockpile. The work accomplished on the ARIES Demonstration Project during fiscal year 1996, 10ctober 1995 through 30 September 1996, is described in this report. The Department of Energy (DOE), by forming the Office of Fissile Materials Disposition (OFMD), has initiated a Fissile Materials Disposition Program. The first step is the disassembly and conversion of weapons pits. Of the 200 metric tons of US surplus fissile material, approximately 50 tons are weapons plutonium, and of these 50 tons, 2/3 is contained in pits. Weapons plutonium wili be extracted from pits, rendered to an unclassified form, and converted to oxide. The plutonium oxide will then be dispositioned either by immobilization in a ceramic matrix or blended with uranium oxide, fabricated into ceramic pellets of mixed oxide (MOX) fuel, and "burned" in a commercial light water reactor. The purpose of ARIES is to demonstrate two major activities: (1) dismantlement of nuclear weapons, and (2) conversion of weapons-grade plutonium into a form required for long-term storage or in preparation for the disposition (immobilization m MOX fuel) that allows for international inspection and verification, and in accordance with safeguards regimes. Plutonium does not have to be declassified before ...
Date: October 1, 1998
Creator: Dennison, David; Massey, Pamela W. & Nelson, Timothy O.
Partner: UNT Libraries Government Documents Department

LLNL`s regional seismic discrimination research

Description: The ability to negotiate and verify a Comprehensive Test Ban Treaty (CTBT) depends in part on the ability to seismically detect and discriminate between potential clandestine underground nuclear tests and other seismic sources, including earthquakes and mining activities. Regional techniques are necessary to push detection and discrimination levels down to small magnitudes, but existing methods of event discrimination are mainly empirical and show much variability from region to region. The goals of Lawrence Livermore National Laboratory`s (LLNL`s) regional discriminant research are to evaluate the most promising discriminants, improve our understanding of their physical basis and use this information to develop new and more effective discriminants that can be transported to new regions of high monitoring interest. In this report we discuss our preliminary efforts to geophysically characterize two regions, the Korean Peninsula and the Middle East-North Africa. We show that the remarkable stability of coda allows us to develop physically based, stable single station magnitude scales in new regions. We then discuss our progress to date on evaluating and improving our physical understanding and ability to model regional discriminants, focusing on the comprehensive NTS dataset. We apply this modeling ability to develop improved discriminants including slopes of P to S ratios. We find combining disparate discriminant techniques is particularly effective in identifying consistent outliers such as shallow earthquakes and mine seismicity. Finally we discuss our development and use of new coda and waveform modeling tools to investigate special events.
Date: July 1, 1995
Creator: Walter, W.R.; Mayeda, K.M. & Goldstein, P.
Partner: UNT Libraries Government Documents Department

Corrective Action Plan for Corrective Action Unit No. 427: Area 3 Septic Waste Systems 2 and 6 Tonopah Test Range, Nevada

Description: This Corrective Action Plan provides the closure methods for Corrective Action Unit 427: Area 3 Septic Waste Systems (SWS) 2 and 6, located at the Tonopah Test Range. SWS 2 consists of Septic Tanks 33-4, 33-5, 33-6, and two associated leachfields. SWS 6 consists of one associated leachfield. The Area 3 SWS 2 and 6 are also known as Corrective Action Sites (CASs) 03-05-002-SW02 and 03-05-002-SW06 respectively. Site investigation activities were completed in February 1998 and are documented in the Corrective Action Decision Document (CADD). The site characterization found septage in Septic Tank 33-5. Septic Tank 33-4 is closed. Septic Tank 33-6 is still active and in line with the Sandia National Laboratories consolidated system. This site was investigated for volatile organic compounds, semivolatile organic compounds, polychlorinated biphenyls, RCRA metals, and total petroleum hydrocarbons. Characterizations of the three leachfields associated with these septic tanks were characterized and not detected above the Preliminary Action Levels. During the characterization, it was determined that Septic Tank 33-5 had not been closed. Therefore, closure activities will consist of removal of the residual septage and closure-in-place. Septic Tank 33-5 will be closed by filling of the emptied tank with clean inert material (sand) and sealing the top with a concrete cap.
Date: November 1, 1998
Creator: Nelson, Jerel G.
Partner: UNT Libraries Government Documents Department

Physics progress report

Description: This document is the December 1948 Physics Division Progress Report from the Mound Laboratory. Items covered include: (1) measurement of the vapor pressure of polonium, (2) x-ray diffraction analysis of tantalum, (3) use of the vacuum balance, and (4) updates on efforts to prepare an x-ray target, measurement of the resistivity of polonium, and construction of polonium gamma standards.
Date: December 1, 1948
Creator: Haring, M.M.
Partner: UNT Libraries Government Documents Department

Maximum likelihood borehole corrections for dual-detector density logs

Description: This report discusses Dual-detector density logs which have been used in the petroleum industry for years. The tool was designed with a second detector to allow compensation for the effect of a layer of mudcake between the tool and the formation being measured. The compensation algorithm commonly used calculates the correction to apply to the density measured by the long-spaced detector as proportional to the difference in the densities measured by the two detectors. The coefficient of proportionality is determined from experimental data taken with the tool in a fluid-filled hole of 15 to 40 cm diameter, with uniform thickness sheets of various materials simulating the mudcake. In applying this technology for the Containment program at the Department of Energy Nevada Test Site (NTS) we have discovered two problems. First, we frequently log in air-filled holes much larger than 40 cm. Second, the gap, or layer, is rarely uniform with depth or vertical position on the face of the tool. We have developed a method to determine the proper amount of correction dynamically. No experimental data on the gap effect are needed as long as the two detectors are calibrated to read the proper density when the gap is zero. The method assumes that the form of the equation used in the standard algorithm is correct, but uses the variation of the two density signals with depth to determine the appropriate value of the coefficient, assuming true density varies more slowly than the gap effects. This new, maximum likelihood, method appears to work better than the standard method in both fluid and air-filled holes where the borehole wall is rough and no mudcake is present. It cannot, however, correct for a uniform mudcake or air gap, and so complements but does not replace the standard method.
Date: October 1, 1993
Creator: Carlson, R.C.
Partner: UNT Libraries Government Documents Department

Radioxenons: Their role in monitoring a Comprehensive Test Ban Treaty

Description: Monitoring for xenon radionuclides which are produced in a nuclear detonation can provide a strong deterrent to the violation of a Comprehensive nuclear Test Ban Treaty (CTBT). There are 18 known radioactive xenon isotopes produced in nuclear fission with half-lives ranging from less than one second to 11.9 days. However, only four of these remain in significant amounts more than a day after a detonation. In order for radioxenon monitoring to be practical, it was necessary to develop an automated measurement system which could operate unattended for periods of months, measure the entire spectrum of radioxenons, and provide hundreds of times better sensitivities than current laboratory procedures. This capability was developed at the US Department of Energy`s Pacific Northwest National Laboratory based on rapid separation of atmospheric xenon coupled with a unique high sensitivity measurement device for the radioxenons. A fieldable prototype analyzer is scheduled for testing in August 1996 with commercial availability planned by 1998.
Date: June 1996
Creator: Perkins, R. W. & Casey, L. A.
Partner: UNT Libraries Government Documents Department

Cold war historic properties of the 21st Space Wing Air Force Space Command

Description: A Legacy-funded inventory and evaluation of facilities dating to the Cold War era was conducted for the USAF 21{sup ST} Space Wing (AFSPC). The mission of the Wing includes early warning of missile launches and detection and tracking of space objects. The political and military strategic context for these facilities was developed through an overview of Cold War history, subdivided into four major periods: (1) origins of the conflict, (2) confrontation and crisis, (3) sustained superpower balance based on mutual deterrence, and (4) renewed confrontation and collapse of the Soviet Union. The enormous importance of early warning systems in maintaining the balance of power between the USA and the Soviet Union is discussed in more detail as a subset of the general context of the Cold War history to provide additional background for evaluating the 21{sup ST} Space Wing systems. In addition, a history of each installation was prepared and placed in the context of the broader history of the Cold War. For instance, the effort to develop a credible nuclear threat in the early 1950s is represented by the construction of Thule AB as a forward bomber base in 1951. The growing concern with a Soviet ICBM threat in the late 1950s is reflected in the construction of BMEWS at Thule AB and Clear AS during 1958-1961. Development of an antiballistic missile (ABM) system, subsequently abandoned during the 1970s, is represented by the Safeguard System at Cavalier AS. The U.S. response to the Soviet submarine-launched missile capability during the 1970s is embodied in the deployment of phased-array radar systems to cover the ocean flanks of North America at Cape Cod AS (and later at Eldorado AS). The establishment of AFSPC at Peterson AFB in 1982 reflects the increased strategic importance of space in the later phases of the Cold ...
Date: March 1, 1996
Creator: Hoffecker, J.F.; Whorton, M. & Buechler, C.R.
Partner: UNT Libraries Government Documents Department

The waveform correlation event detection system project: Issues in system refinement, tuning, and operation

Description: The goal of the Waveform Correlation Event Detection System (WCEDS) Project at Sandia Labs has been to develop a prototype of a full-waveform correlation based seismic event detection system which could be used to assess potential usefulness for CTBT monitoring. The current seismic event detection system in use at the IDC is very sophisticated and provides good results but there is still significant room for improvement, particularly in reducing the number of false events (currently being nearly equal to the number of real events). Our first prototype was developed last year and since then we have used it for extensive testing from which we have gained considerable insight. The original prototype was based on a long-period detector designed by Shearer (1994), but it has been heavily modified to address problems encountered in application to a data set from the Incorporated Research Institutes for Seismology (IRIS) broadband global network. Important modifications include capabilities for event masking and iterative event detection, continuous near-real time execution, improved Master Image creation, and individualized station pre-processing. All have been shown to improve bulletin quality. In some cases the system has detected marginal events which may not be detectable by traditional detection systems, but definitive conclusions cannot be made without direct comparisons. For this reason future work will focus on using the system to process GSETT3 data for comparison with current event detection systems at the IDC.
Date: August 1, 1996
Creator: Young, C.J.; Beiriger, J.I.; Harris, J.M.; Moore, S.G.; Trujillo, J.R.; Withers, M.M. et al.
Partner: UNT Libraries Government Documents Department

A comparison of the response of a captive carried store to both reverberant and progressive wave acoustic excitation

Description: Stores carried on high performance military aircraft are exposed to severe vibroacoustic environments which are caused by several different sources. Two methods available for simulating the acoustic portion of this environment in the laboratory are reverberant chambers and progressive wave tubes. The literature indicates that structures will respond differently to each of these acoustic sources as a function of frequency for the same Sound Pressure Level. Sandia National Laboratories participated in a test program that obtained acoustic data for a common store using both types of acoustic excitation. The purpose of this paper is to present the results from those tests in such a way so as to document the existence or absence of any significant differences in the coupling efficiencies for these acoustic sources.
Date: December 31, 1995
Creator: Cap, J.S.
Partner: UNT Libraries Government Documents Department

Correspondence (Top Secret) of the Manhattan Engineer District, 1942--1946

Description: This pamphlet prepared by the National Archives Trust Fund Board, National Archives Records Service provides an overview to a collection of formerly security classified `Top Secret` correspondence maintained by Major General Leslie Groves when commanding general of the Manhattan District from September, 1942 to December, 1946. The pamphlet describes the administrative history of the record collection. The records are described as well as how they are arranged along with finding aids and content of records. For further details concerning the se records the user is referred to the US National Archives, Washington.
Date: December 31, 1982
Partner: UNT Libraries Government Documents Department

Proceedings of the workshop on neutron-induced gamma-ray physics at LANSCE/WNR

Description: The purpose of the workshop was to present the unique capabilities of LANSCE coupled with a large scale Compton suppressed Ge detector array and to help define a future experimental research program. This document contains the vuegraphs from the unclassified session. The vuegraphs were kindly provided by the invited speakers who came from both the university and the national laboratory communities. The talks focused on planned as well as potential experiments at LANSCE/WNR and their importance to the field.
Date: July 1, 1996
Creator: Strottman, D.D.
Partner: UNT Libraries Government Documents Department

Comprehensive test ban treaty international monitoring system security threats and proposed security attributes

Description: To monitor compliance with a Comprehensive Test Ban Treaty (CTBT), a sensing network, referred to as the International Monitoring System (IMS), is being deployed. Success of the IMS depends on both its ability to preform its function and the international community`s confidence in the system. To ensure these goals, steps must be taken to secure the system against attacks that would undermine it; however, it is not clear that consensus exists with respect to the security requirements that should be levied on the IMS design. In addition, CTBT has not clearly articulated what threats it wishes to address. This paper proposes four system-level threats that should drive IMS design considerations, identifies potential threat agents, and collects into one place the security requirements that have been suggested by various elements of the IMS community. For each such requirement, issues associated with the requirement are identified and rationale for the requirement is discussed.
Date: March 1, 1996
Creator: Draelos, T.J. & Craft, R.L.
Partner: UNT Libraries Government Documents Department

Application of the GRI 1.2 methane oxidation model to methane and methanol oxidation in supercritical water

Description: The GRI 1.2 mechanism is used to predict the oxidation rates of methane and methanol by oxygen in supercritical water at 250 bar and temperatures ranging from 420--630 C. Using the Chemkin II computational package which assumes an ideal gas equation of state, the GRI model does very well in representing the available experimental results on methane over a wide temperature and concentration rate. However, the model may lack key CH{sub 3}O{sub 2} reactions needed for a complete description in the < 450 C region. The oxidation of methanol and formation of formaldehyde is not well represented by the GRI mechanism when left unchanged. If two important modifications are made to the reactivity of HO{sub 2}, good agreement with the methanol oxidation results is achieved. This paper illustrates that the carefully-assembled GRI 1.2 mechanism, although designed for conventional combustion conditions, can be successfully extended with very little modification to much lower temperature and extreme pressure conditions. The purpose of this study is to understand the operative chemical kinetics of supercritical water oxidation required for the more efficient application of this technology to treatment of hazardous wastes, obsolete munitions, rocket motors, and chemical warfare agents.
Date: May 1996
Creator: Rice, S. F.
Partner: UNT Libraries Government Documents Department

Inversion of Passive Electromagnetic Fields to Locate Weapons of Mass Destruction

Description: A resolution study, employing a 3D nonlinear optimization technique, has been undertaken to study the viability of magnetotelluric (MT) measurements to detect and characterize buried facilities that make weapons of mass destruction. A significant advantage of the MT method is that no active source is required because the method employs passive field emissions. Thus measurements can be carried out covertly. Findings indicate it is possible to image WMD facilities, including depth of burial and lateral extent if a sufficient number of measurements are taken on the perimeter of the facility. Moreover if a station measurement can be made directly over the facility then the resolution is improved accordingly. In all cases it was not possible to image the base of the facility with any confidence as well as provide any precise inferences on the facility electrical conductivity. This later finding, however, is really not that critical since knowledge of facility geometry is far more important than knowledge of its conductivity. For the WMD problem it is recommended that MT measurements be made solely with the magnetic field ratios. In this context it would then be possible to deploy with far greater ease small coils about a suspected facility and would allow for the measurements to be conducted in a more covert manner. Before testing such a measurement system in the field, however, it would be necessary to carry out a similar resolution analysis as was done with MT measurements based on electric and magnetic fields. This is necessary to determine sensitivity of the proposed measurement to underground facilities along with needed data coverage and quality. Such a study is indispensable in producing useful reconstructions of underground facilities.
Date: December 24, 1998
Creator: Day, D.M. & Newman, G.A.
Partner: UNT Libraries Government Documents Department

Non-proliferation issues for the disposition of fissile materials using reactor alternatives

Description: The Department of Energy (DOE) is analyzing long-term storage on options for excess weapons-usable fissile materials. A number of the disposition alternatives are being considered which involve the use of reactors. The various reactor alternatives are all very similar and include front-end processes that could convert plutonium to a usable form for fuel fabrication, a MOX fuel fab facility, reactors to bum the MOX fuel and ultimate disposal of spent fuel in some geologic repository. They include existing, partially completed, advanced or evolutionary light water reactors and Canadian deuterium uranium (CANDU) reactors. In addition to the differences in the type of reactors, other variants on these alternatives are being evaluated to include the location and number of the reactors, the location of the mixed oxide (MOX) fabrication facility, the ownership of the facilities (private or government) and the colocation and/or separation of these facilities. All of these alternatives and their variants must be evaluated with respect to non-proliferation resistance. Both domestic and international safeguards support are being provided to DOE`s Fissile Materials Disposition Program (FMDP) and includes such areas as physical protection, nuclear materials accountability and material containment and surveillance. This paper will focus on how the non-proliferation objective of reducing security risks and strengthening arms reduction will be accomplished and what some of the nonproliferation issues are for the reactor alternatives. Proliferation risk has been defined in terms of material form, physical environment, and the level of security and safeguards that is applied to the material. Metrics have been developed for each of these factors. The reactor alternatives will be evaluated with respect to these proliferation risk factors at each of the unit process locations in the alternative.
Date: February 1, 1996
Creator: Jaeger, C.D.; Duggan, R.A. & Tolk, K.M.
Partner: UNT Libraries Government Documents Department

Contamination source review for Building E3642, Edgewood Area, Aberdeen Proving Ground, Maryland

Description: Many of the APG facilities constructed between 1917 and the 1960s are no longer used because of obsolescence and their poor state of repair. Because many of these buildings were used for research, development, testing, and/or pilot-scale production of chemical warfare agents and other military substances, the potential exists for portions of these buildings to be contaminated with these substances, their degradation products, and other laboratory or industrial chemicals. These buildings and associated structures or appurtenances may contribute to environmental concerns at APG. The US Army Aberdeen Proving Ground (APG) commissioned Argonne National Laboratory (ANL) to conduct a contamination source review to identify and define areas of toxic or hazardous contaminants and to assess the physical condition and accessibility of APG buildings. The information obtained from the review may be used to assist the US Army in planning for the future use or disposition of the buildings. The contamination source review consisted of the following tasks: historical records search, physical inspection, photographic documentation, geophysical investigation and review of available records regarding underground storage tanks associated with the building. This report provides the results of the contamination source review for Building E3642.
Date: September 1, 1995
Creator: Booher, M. N.; O`Reilly, D. P.; Draugelis, A. K.; Rueda, J. & Zimmerman, R. E.
Partner: UNT Libraries Government Documents Department

Vicarious amination of nitroarenes with trimethylhydrazinium iodine

Description: This paper investigated the use of 1,1,1-trimethylhydrazinium iodide as a vicarious nucleophilic substitution reagent for introducing amino groups into nitroaromatic substrates. The substrates included nitroarenes, polynitrobenzenes, picramide, TNB,TNT, and dinitropyrazole; other nitroazoles are being studied.
Date: November 10, 1995
Creator: Pagoria, P.F.; Schmidt, R.D. & Mitchell, A.R.
Partner: UNT Libraries Government Documents Department

Effect of sulfur on the ductility of copper shaped-charge jets

Description: We have observed that a change in bulk sulfur (S) content imposed by doping has a marked effect on ductility of copper shaped-charge jets as measured by breakup times and length-to-diameter ratios of the particulated jet. Baseline material was Oxygen-Free-Electronic (ofe) copper with a S concentration of 3-4 ppM. Several liners were doped using a Cu sulfide powder pack method to increase the S level up to 9 ppM, while keeping other impurities and microstructure unchanged. Using flash x-ray radiographs to record the formation of jets, both the length-to-diameter ratios of the jet particles and breakup times were measured. Increasing the bulk S content of ofe Cu to 9 ppM, the breakup times decreased from 186 to 147 {mu}s, while the length-to- diameter ratios observed at 260 {mu}s decreased from 8:1 to 5:1. Since the solubility of S in Cu at the processing temperatures is extremely low, we conclude that the bulk rise in S content is due to S segregating to the grain boundaries. Thus, the decrease in ductility of liners doped with S appears directly related to the S content at the grain boundaries.
Date: July 1, 1996
Creator: Lassila, D.H.; Chan, D.K.; King, W.E.; Schwartz, A.J. & Baker, E.L.
Partner: UNT Libraries Government Documents Department

Institutional Strain and Precarious Values in Meeting Future Nuclear Challenges

Description: This paper explores the implications of moderately expanding plutonium "pit" production capability within the strongly R&D culture of Los Alamos National Laboratory, especially in terms of the lab's current capacity or "fitness for the future" in which institutional stewardship of the nation's nuclear deterrent capability becomes a primary objective. The institutional properties needed to assure "future fitness" includes the organizational requisites highly reliable operations and sustained institutional constancy in a manner that evokes deep public trust and confidence. Estimates are made of the degree to which the key Division and most relevant Program office in this evolution already exhibits them.
Date: November 1, 1998
Creator: Matthews, Bruce & LaPorte, Todd R.
Partner: UNT Libraries Government Documents Department

Knowledge fusion: An approach to time series model selection followed by pattern recognition

Description: This report describes work done during FY 95 that was sponsored by the Department of Energy, Office of Nonproliferation and National Security, Knowledge Fusion Project. The project team selected satellite sensor data to use as the one main example for the application of its analysis algorithms. The specific sensor-fusion problem has many generic features, which make it a worthwhile problem to attempt to solve in a general way. The generic problem is to recognize events of interest from multiple time series that define a possibly noisy background. By implementing a suite of time series modeling and forecasting methods and using well-chosen alarm criteria, we reduce the number of false alarms. We then further reduce the number of false alarms by analyzing all suspicious sections of data, as judged by the alarm criteria, with pattern recognition methods. An accompanying report (Ref 1) describes the implementation and application of this 2-step process for separating events from unusual background and applies a suite of forecasting methods followed by a suite of pattern recognition methods. This report goes into more detail about one of the forecasting methods and one of the pattern recognition methods and is applied to the same kind of satellite-sensor data that is described in Ref. 1.
Date: March 1996
Creator: Bleasdale, S. A.; Burr, T. L.; Scovel, J. C. & Strittmatter, R. B.
Partner: UNT Libraries Government Documents Department

ARG portable neutron radiography. Final report

Description: In this report all available neutron radiographic data, including results of tests run at LANL, McClellan AFB, and University of Virginia, will be combined to outline specific transportable neutron radiography systems that could achieve the desired results as a complement to x-radiography capabilities for the Accident Response Group (ARG).
Date: April 1, 1995
Creator: Barton, J.P.
Partner: UNT Libraries Government Documents Department