Bouwsma, Ward D. Basic mathematics for elementary teachers / Ward D. Bouwsma, Clyde G. Corle & Davis F. Clemson - New York : Ronald Press , 1967 - vii, 342p. : ill. ; 24 cm. Includes bibliographical references and index. Subjects--Topical Terms: MathematicsFoundationsArithmetic Dewey Class. No.: 510 / BOU