Saxena, H. C. The calculus of finite differences, by H. C. Saxena. - [2d ed.] - Delhi, S. Chand, 1965. - 164 p. 22 cm. LCCN: sa 66007490 Subjects--Topical Terms: Difference equations. LC Class. No.: QA431 / .S3 1965 Dewey Class. No.: 517.6