Zill, Dennis G. A first course in differential equations with modeling applications / Dennis G. Zill - 11th ed. - United States : Brooks/Cole, cengage learning, 2013 - x, 389 p. : ill. ; 28 cm. Includes bibliographical references and indexes ISBN: 9781337556644 Subjects--Topical Terms: Equations Dewey Class. No.: 515.35 / ZIL