Coddington, Earl A., 1920- Theory of ordinary differential equations [by] Earl A. Coddington [and] Norman Levinson. - New York, McGraw-Hill, 1955. - 429 p. illus. 24 cm. - International series in pure and applied mathematics . LCCN: 54011260 Subjects--Topical Terms: Differential equations. LC Class. No.: QA372 .C6 1955 Dewey Class. No.: 517.38