Air mail.
Hearings, Seventieth Congress, first session on H.R. 7213 and H.R. 8337. January 12, 13, 1928.
APA Citation
United States. Congress. House. Committee on Post Office and Post Roads. (1928). Air mail: Hearings, Seventieth Congress, first session on H.R. 7213 and H.R. 8337. January 12, 13, 1928. Washington: U.S. Govt. Print. Off..
MLA Citation
United States. Congress. House. Committee on Post Office and Post Roads. Air Mail: Hearings, Seventieth Congress, First Session On H.R. 7213 And H.R. 8337. January 12, 13, 1928. Washington: U.S. Govt. Print. Off., 1928.
Warning: These citations may not always be complete (especially for serials).