Coddington, Earl A. 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 /L Subjects--Topical Terms: Differential equations LC Class. No.: QA372 / .C6 Dewey Class. No.: 517.38