National Center for Educational Statistics, National Center for Education Statistics (U.S.), & United States. Office of Educational Research and Improvement. Center for Education Statistics. The Condition of education. U.S. Dept. of Education, Office of Educational Research and Improvement, National Center for Education Statistics : For sale by the Supt. of Docs., U.S. G.P.O..

National Center for Educational Statistics, National Center for Education Statistics (U.S.), and United States. Office of Educational Research and Improvement. Center for Education Statistics. The Condition of Education. Washington, D.C.: U.S. Dept. of Education, Office of Educational Research and Improvement, National Center for Education Statistics : For sale by the Supt. of Docs., U.S. G.P.O..

National Center for Educational Statistics, et al. The Condition of Education. U.S. Dept. of Education, Office of Educational Research and Improvement, National Center for Education Statistics : For sale by the Supt. of Docs., U.S. G.P.O..