G.P.O.1962Biennial survey of education in the United States, 1956-58 / U.S. Department of Health, Education, and Welfare, Office of Education
chapter 1
G.P.O.1961Biennial survey of education in the United States, 1956-58 / U.S. Department of Health, Education, and Welfare, Office of Education
chapter 4, section 2