History of United States Army School of Military Aeronautics, Berkeley, California (1919)
Thomas, Gilbert M, United States. Army School of Military Aeronautics · [Berkeley, Calif.] : Director of Military Aeronautics, Training Section, Ground Schools Branch · leaf 1067
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Aeronautics, Military
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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