00315nam a2200133Ia 4500 Speegel /Murry .R BK calculus Theary & Problems of Calculus of Finite Differences McGraw-Hill New York 1971 519 SPI 259 ENGLISH 25250 25250 0 0 0 0 CRC CRCE CRCE 1462 | 11 2023-03-17 Progressive Books 376.05 2084 dt 10.02.93 0 519 SPI 4171 2023-03-17 376.05 1993-02-10 BK