Jay C. Chambers, Robert Vergun, Adrienne ChuteU.S. Dept. of Education, Office of Educational Research and Improvement : For sale by the U.S. G.P.O., Supt. of Docs.[1999]
Susan P. Choy, Robin R. Henke, MPR Associates, Inc. ; Carl M. Schmitt, project officerU.S. Dept. of Education, Office of Educational Research and Improvement : For sale by the U.S. G.P.O., Supt. of Docs.1992