Investigation of interactive technologies for early math and science concepts for preschool children microform : final report--phrase I / Laura J. Colker, Elaine Robey, Carolyn DeMeyer Harris
原資料の出版事項: Silver Spring, Md. ; [Washington, DC] : Macro Systems, Inc. : U.S. Dept. of Education, Office of Educational Research and Improvement, Educational Resources Information Center, [1990]