[Committee hearing] serial, 92d Congress. 83. Emergency medical services act of 1972, pt. 1, hearings before Subcommittee on Public Health and Environment, 92d Congress, 2d session on H.R. 12563, H.R. 13582, H.R. 12787, H.R. 13447 [and] H.R. 9876, June 13-15, 1972.