Ross, Shepley L. Introduction to ordinary differential equations / Shepley L. Ross - 4th ed. - New York : John Wiley & Sons, 1989. - xi, 609 p. : ill. ; 24 cm. Includes index. ISBN: 0471098817 LCCN: 88021589 Subjects--Topical Terms: Differential equations. Dewey Class. No.: 515.35 / ROI