National Security Technologies, LLC. Closure Report for Corrective Action Unit 484: Surface Debris, Waste Sites, and Burn Area, Tonopah Test Range, Nevada, report, September 1, 2007; (https://digital.library.unt.edu/ark:/67531/metadc899464/m1/1/: accessed March 22, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .