Burton, David M. Elementary number theory / by David M. Burton. - 7th ed. - Boston : McGraw-Hill, Higher Education, 2023.. - xii, 436 p. : ill. ; 24 cm. Includes bibliographical references and index. ISBN: 9789355325129 Subjects--Topical Terms: Number theory. Dewey Class. No.: 512.72 / BUR/E