Simmons, George Finlay, Differential equations: with applications and historical notes/ by George F. Simmons. - , -New Delhi : McGraw-Hill ,1972 - xv, 465 p. illus. - International series in pure and applied mathematics . Includes bibliographical references. ISBN: 0070573751 Subjects--Topical Terms: Differential equations. Dewey Class. No.: 515.35 SIM/D