OSHA oversight--video display terminals in the workplace : hearings before the Subcommittee on Health and Safety of the Committee on Education and Labor, House of Representatives, Ninety-eighth Congress, second session, hearings held in Washington, D.C., on February 28; March 13; April 3; May 1, 8, 15; June 5 and 12, 1984. (U.S. G.P.O., 1985)