TY - BOOK TI - The leadership role of state supervisors of mathematics : : report of a conference under the auspices of the U. S. Department of Health, E ducation, and Welfare, Washington, June 19-23, 1961 U1 - 371.102 PY - 1962/// CY - Washington, D. C. : PB - Government Printing Office, KW - State supervision of teaching ER -