Finizio, N. An introduction to differential equations : with difference equations, Fourier series and partial differential equations / N. Finizio and G. Ladas. - Belmont, Calif. : Wadsworth Pub. Co., c1982. - xvi, 484, [92] p. : ill. ; 24 cm. Includes bibliographical references and index. ISBN: 0534009603 Subjects--Topical Terms: Differential equations. Dewey Class. No.: 515.35 / FII 1982