Equal pay for equal work : hearings before the Select Subcommittee on Labor, House of Representatives, Eighty-seventh Congress, second session, on H. R. 8898; H. R. 10226, and various bills to prohibit discrimination on account of sex in the payment of wages by employers engaged in commerce or in the production of goods for commerce and to provide for the restitution of wages lost by employees by reason of any such discrimination.