Sánchez, David A. Differential equations / David A. Sanchez, Richard C. Allen, Jr., Walter T. Kyner. - 2nd ed. - Reading, Mass. : Addison-Wesley Pub. Co., c1988. - 1 v. (various pagings) ; 24 cm. Includes bibliographies and index. ISBN: 0201154072 : LCCN: 87022949 Subjects--Topical Terms: Differential equations. LC Class. No.: QA372 / .S17 1988 Dewey Class. No.: 515.35 / SAD 1988