Impact of electronic communications systems on postal operations : hearings before the Subcommittee on Postal Operations and Services of the Committee Post Office and Civil Service, House of Representatives, Ninety-fifth Congress, first session, April 6, and May 5, 1977.
United States.Congress.House.Committee on Post Office and Civil Service.Subcommittee on Postal Operations and Services.
Washington : U.S. Govt. Print. Off.,
1978.
"Serial no. 95-76."
Postal service