Six-day mail delivery : hearings before the Committee on Post Office and Civil Service, House of Representatives, Ninety-fifth Congress, first and second sessions.
United States.Congress.House.Committee on Post Office and Civil Service.
Washington : U.S. Govt. Print. Off.,
1978.
Hearings held Nov. 18, 1977-Mar. 11, 1978.
"Serial no. 95-61."
Postal service