Garstens, Helen L. Mathematics for elementary school teachers [by] Helen L. Garstens & Stanley B. Jackson. - New York Macmillan [1967] - xii, 500 p. illus. 26 cm. LCCN: 67016709 Nat. Bib. No.: GB67-17955 Subjects--Topical Terms: Mathematics LC Class. No.: QA39 / .G322 Dewey Class. No.: 510/.024/37