Rohwer, William D. Understanding intellectual development : three approaches to theory and practice / William D. Rohwer, Paul R. Ammon and Phebe Cramer - Hinsdale : Dryden Press, c1974 - x, 429 p. : ill. ; 24 cm. Includes index ISBN: 003089543X : USD 12.95 Subjects--Topical Terms: IntellectChild psychology Dewey Class. No.: 136.72