Bolker, Ethan D. Elementary number theory; an algebraic approach [by] Ethan D. Bolker. - New York, W. A. Benjamin, 1970 [c1969] Bibliography: p. 173. ISBN: 0805310185 LCCN: 76092217 //r92 Subjects--Topical Terms: Number theory. LC Class. No.: QA241 / .B72 Dewey Class. No.: 512/.81