Occupational Safety and Health Act of 1970 (oversight and proposed amendments) : hearings before the Select Subcommittee on Labor of the Committee on Education and Labor, House of Representatives, Ninety-third Congress, second session on an Act to assure safe and healthful working conditions for working men and women; by authorizing enforcement of the standards developed under the Act; by assisting and encouraging the states in their efforts to assure safe and healthful working conditions; by providing for research, information, education, and training in the field of occupational safety and health; and for other purposes. Hearings held in Washington, D.C. March 19, 20; April 24, 25; May 22, 23; June 25, 26; July 25; September 17, 18, 19, 25, 26; Portland, OREG., November 14 and San Francisco, CALIF., November 16, 1974.