Derrick, William R. Elementary differential equations with applications : a short cou rse / William R. Derrick, Stanley I. Grossman. - 2d ed. - Reading, Mass. : Addison-Wesley Pub. Co., 1981. - 325 p. in various pagings : ill. ; 24 cm. Includes index. ISBN: 0201031647 LCCN: 80-021680 Subjects--Topical Terms: Differential equations.-------- Dewey Class. No.: 515.35 DER