Nagle, R. Kent. Fundamentals of differential equations / R. Kent Nagle, Edward B. Saff, Arthur David Snider. - Eighth edition. - xviii, 644 pages, 52 variously numbered pages : illustrations ; 26 cm Includes index. ISBN: 9780321747730 (hardback) Subjects--Topical Terms: Differential equations. Dewey Class. No.: 515.35 / NAG 2012