Surface freight rates : hearings before the Subcommittee on Transportation and Aeronautics of the Committee on Interstate and Foreign Commerce, House of Representatives, Ninety-first Congress, second session on H.R. 10293, a bill to amend part I of the Interstate Commerce Act, as amended, to authorize railroads to publish rates for use by common carriers, January 27, 28, 29, 30; February 3, 4, and 5, 1970