United States. Congress. House. Committee on Post Office and Civil Service. Subcommittee on Postal Rates & ProQuest (Firm). (1968). Conditions of Mailing at Special Fourth-Class Rates: Hearings before the United States House Committee on Post Office and Civil Service, Subcommittee on Postal Rates, Ninetieth Congress, second session, on Sept. 10, 1968. U.S. G.P.O..
Chicago Style (17th ed.) CitationUnited States. Congress. House. Committee on Post Office and Civil Service. Subcommittee on Postal Rates and ProQuest (Firm). Conditions of Mailing at Special Fourth-Class Rates: Hearings Before the United States House Committee on Post Office and Civil Service, Subcommittee on Postal Rates, Ninetieth Congress, Second Session, on Sept. 10, 1968. Washington: U.S. G.P.O., 1968.
MLA (9th ed.) CitationUnited States. Congress. House. Committee on Post Office and Civil Service. Subcommittee on Postal Rates and ProQuest (Firm). Conditions of Mailing at Special Fourth-Class Rates: Hearings Before the United States House Committee on Post Office and Civil Service, Subcommittee on Postal Rates, Ninetieth Congress, Second Session, on Sept. 10, 1968. U.S. G.P.O., 1968.