United States. War Department. (1931). Air Corps: Identification of aircraft, changes numbers 1. GPO.
Chicago Style (17th ed.) CitationUnited States. War Department. Air Corps: Identification of Aircraft, Changes Numbers 1. [Washington]: GPO, 1931.
MLA (9th ed.) CitationUnited States. War Department. Air Corps: Identification of Aircraft, Changes Numbers 1. GPO, 1931.
Warning: These citations may not always be 100% accurate.