United States. Congress. House. Committee on Post Office and Post Roads & ProQuest (Firm). (1919). Loss of Mail by Aeroplane Fire: Hearings before the United States House Committee on Post Office and Post Roads, Sixty-Sixth Congress, first session, on July 19, 1919. U.S. G.P.O..
Chicago Style (17th ed.) CitationUnited States. Congress. House. Committee on Post Office and Post Roads and ProQuest (Firm). Loss of Mail by Aeroplane Fire: Hearings Before the United States House Committee on Post Office and Post Roads, Sixty-Sixth Congress, First Session, on July 19, 1919. Washington: U.S. G.P.O., 1919.
MLA (9th ed.) CitationUnited States. Congress. House. Committee on Post Office and Post Roads and ProQuest (Firm). Loss of Mail by Aeroplane Fire: Hearings Before the United States House Committee on Post Office and Post Roads, Sixty-Sixth Congress, First Session, on July 19, 1919. U.S. G.P.O., 1919.