00581cam a22002291 4500 sa 66007490 DLC 20260227112305.0 750318s1965 xx 000 0 eng sa 66007490 (OCoLC)1222766 DLC OTU DLC premarc QA431 .S3 1965 517.6 Saxena, H. C. The calculus of finite differences, by H. C. Saxena. [2d ed.] Delhi, S. Chand, 1965. 164 p. 22 cm. Difference equations. 71225 71225