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Senate Hearing, 93rd Congress - Federal-aid highway act of 1973: hearings before the Subcommittee on Transportation of the Committee on Public Works, United States Senate, Ninety-third Congress, first session, on S. 502, a bill to authorize appropriations for the construction of certain highways in accordance with Title 23 of the United States Code, and for other purposes; and related other bills, February 7, 8, 15, and 16, 1973.