School health services : hearings before a subcommittee of the Committee on Labor and Public Welfare, United States Senate, Eightieth Congress, second session, on S. 1290, a bill to provide for the general welfare by enabling the several States to make more adequate provision for the health of school children through the development of school health services for the prevention, diagnosis, and treatment of physical and mental defects and conditions. Mar. 8 and 9, 1948.