Hearings Before the Committee on Post Office and Civil Service, House of Representatives, Eighty-sixth Congress, Second Session, on H.R. 11140 and Related Bills; Bills to Eadjust Postal Rates, and for Other Purposes. May 10, 11, 12, 17, 18, 19, 20, 24, 25, 26; June 1, 2, 3, 7, 8, 1960