Greenspan, Donald. Theory and solution of ordinary differential equations. - New York Macmillan [1960] - 148 p. illus. 24 cm. - A Series of mathematics texts . LCCN: 60005311 /L/r84 Subjects--Topical Terms: Differential equations LC Class. No.: QA372 / .G73 Dewey Class. No.: 517.38