Das, B. C. Differential calculus / B. C. Das. - 44th ed. - Calcutta: U. N. Dhur, c1998. - xx, 476p.: ill.;, figs.;, tables.;, maps.; 18 cm. Includes index. Dept. of CSE ISBN: 8185624437 Subjects--Topical Terms: Indeterminate forms Dewey Class. No.: 515.33 / DAD