Fair labor standards amendments of 1973 : hearings before the General Subcommittee on Labor of the Committee on Education and Labor, House of Representatives, Ninety-third Congress, first session, on H.R. 4757 and H.R. 2831, bills to amend the Fair Labor Standards Act of 1938 to increase the minimum wage rates under that act, to expand the coverage of that act, and for other purposes.