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Primary view of Natural History of the Tres Marías Islands, Mexico
Nelson, E. W.; Stejneger, Leonhard; Rathbun, Mary J. & Rose, J. N.
April 29, 1899
Primary view of To Establish Glacier National Park in Montana, Report
United States. Congress. Senate. Committee on Public Lands
April 29, 1908
Primary view of Revision of the Mice of the American Genus Peromyscus
Osgood, Wilfred H.
April 17, 1909
Primary view of A Systematic Synopsis of the Muskrats
Hollister, N.
April 29, 1911
Primary view of Hydraulic Mine Filling: Its Use in the Pennsylvania Anthracite Fields, A Preliminary Report
Enzian, Charles
April 1913
Primary view of Methods of Preventing and Limiting Explosions in Coal Mines
Rice, George S. & Jones, L. M.
April 1915
Primary view of Revision of the American Marmots
Howell, Arthur H.
April 7, 1915
Primary view of Temperature-Viscosity Relations in the Ternary System CaO-Al₂O₃-SiO₂
Feild, Alexander L. & Royster, P. H.
April 1918
Primary view of Educational Agencies in Mining Communities
Read, Thomas Thornton, 1880-1947
April 1920
Primary view of Notes on Longitudinal Stability and Balance
Warner, E. P.
April 1920
Primary view of Abstracts from the German Technical Press: Rates for Flights Organized by the State
United States. National Advisory Committee for Aeronautics.
April 1921
Primary view of The Coupling of Engines
Boccaccio, Paul
April 1921
Primary view of Extracts from the German Technical Process. Transport Airplanes.
Rohrbach, A. K.
April 1921
Primary view of Gordon Bennett Airplane Cup 1920
Margoulis, W.
April 1921
Primary view of On the Definition of the Standard Atmosphere
Grimault, P.
April 1921
Primary view of On the Resistance of the Air at High Speeds and on the Automatic Rotation of Projectiles
Riabouchinski, D.
April 1921
Primary view of Recent European Developments in Helicopters
unknown creator
April 1921
Primary view of Resume of the Theory of Naval and Aerial Propulsive Propellers and of Airplanes in the Rectilinear Flight
Rateau, A.
April 1921
Primary view of Similitude tests on wing sections
Kumbruch, H. & Bacon, D. L.
April 1921
Primary view of Sixth Meeting of the Members of the German Scientific Association for Aeronautics
unknown creator
April 1921
Primary view of Some New Tests at the Gottingen Laboratory
unknown creator
April 1921
Primary view of Study of the Resistance Offered by Propellers Rotating on an Airstream
Lame, M.
April 1921
Primary view of The Technical Development of the Transport airplane: Report of the Aero-Technical Conference of the Scientific Association for Aeronautics, March 5, 1919
unknown creator
April 1921
Primary view of Fire Tests of Building Columns
Ingberg, S. H.; Griffin, H. K.; Robinson, W. C. & Wilson, R. E.
April 21, 1921
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