Railroad retirement and unemployment insurance (creditable and taxable compensation) : Hearing before the Committee on Interstate and Foreign Commerce, House of Representatives, Eighty-eighth Congress, first session, on H.R. 8100, a bill to amend the Railroad retirement act of 1937, the Railroad retirement tax act, the Railroad unemployment insurance act, and the Temporary extended railroad unemployment insurance benefits act of 1961 to increase the creditable and taxable compensation, and for other purposes. September 11, 1963.