Hearings Before the Subcommittee on Transportation and Aeronautics of the Committee on Interstate and Foreign Commerce, House of Representatives, Eighty-ninth Congress, First Session, on H.R. 5863, a Bill to Authorize the Secretary of Commerce to Undertake Research and Development in High-speed Ground Transportation, and for Other Purposes (and Identical Bills), May 19, 25, and June 29, 30, 1965