Boyce, William E. Elementary differential equations and boundary value problems [by] William E. Boyce and Richard C. Di Prima. - New York, J. Wiley [1965] - xvi, 485 p. illus. 24 cm. Bibliography: p. 435. LCCN: 65014259 Subjects--Topical Terms: Differential equations.Boundary value problems. LC Class. No.: QA372 / .B73 Dewey Class. No.: 517.38