Guterman, Martin M. Differential equations : a first course / Martin M. Guterman and Zbigniew H. Nitecki. - Philadelphia : Saunders College Pub., c1984. - xv, 590 p. : ill. ; 24 cm. - The Saunders series . Includes index. Bibliography: p. 589-590. ISBN: 0030625025 Subjects--Topical Terms: Differential equations. Dewey Class. No.: 515.35 / GUD 1984