APA (7th ed.) Citation

United States. Army. Air Corps. (1932). Indexes: Numerical index to Air Corps Circulars. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. Indexes: Numerical Index to Air Corps Circulars. Washington: [publisher not identified], 1932.

MLA (9th ed.) Citation

United States. Army. Air Corps. Indexes: Numerical Index to Air Corps Circulars. [publisher not identified], 1932.

Warning: These citations may not always be 100% accurate.