To amend the Interstate commerce act. : Hearings before the Committee on interstate commerce, United States Senate, Seventy-fourth Congress, first session, on S. 1629, a bill to amend the Interstate commerce act, as amended / by providing for the regulation of the transportation of passengers and property by motor carriers operating in interstate or foreign commerce, and for other purposes; S. 1632, a bill to amend the Interstate commerce act, as amended, by providing for the regulation of the transportation of passengers and property by water carriers operating in interstate and foreign commerce and for other purposes; S. 1635, a bill to amend the Interstae commerce act, as amended, and for other purposes.