Washington, D.C. U.S. Dept. of Education, Office of Educational Research and Improvement, National Center for Education Statistics, Institute of Education Sciences | : For sale by the Supt. of Docs., U.S. G.P.O. 1975 .
v. , Supt. of Docs. class no. for ERIC version is: ED 1.310/2: | Description based on: 1982 ed., [pt. 1]. 23 cm..

Washington, D.C. : U.S. Dept. of Education, Office of Educational Research and Improvement, National Center for Education Statistics, Institute of Education Sciences , | : For sale by the Supt. of Docs., U.S. G.P.O. , 2009 .
323 p. , Supt. of Docs. class no. for ERIC version is: ED 1.310/2: 23 cm..
9780160832925