Health care crisis in America, 1971. Part 10, May 5, 1971, Chicago, Ill., May 13, 1974, Des Moines, Iowa, May 14, 1974, Denver, Colo. : hearings before the Subcommittee on Health of the Committee on Labor and Public Welfare, United States Senate, Ninety-second Congress, first session on examination of the health care crisis in America