by Richard H. Barr and Geraldine J. Scott ; U.S. Department of Health, Education, and Welfare, Office of Education, National Center for Educational StatisticsG.P.O.1970
Samuel Schuloss, specialist in educational statistics ; and Carol Joy Hobson, research assistant ; prepared this chapter under the general direction of Emery M. FosterG.P.O.1956
Samuel Schloss, specialist in educational statistics ; and Carol Joy Hobson, research assistant ; prepared this chapter under the general direction of Emery M. FosterG.P.O.1955