BOYCE, William E Diprima, Richard C. Elementary Differential equations and boundary value problems / [by] William E.Boyce, Richard C.Diprima - 5th ed. - New York John Wiley & sons 1992 - xv, 680 p. Index: p. I1-I7. ISBN: 471509981 Subjects--Topical Terms: Differential equations Dewey Class. No.: 515.35 / BOY