Das, B. C. Integral calculus : including differential equations / B. C. Das and B. N. Mukherjee. - 45th ed. - Calcutta : U.N. Dhur & Sons.Private Ltd., 1999. - xxvi, 464 pages : illustrations ; 18 cm. ISBN: 8185624917 Subjects--Topical Terms: Calculus, Integral.Differential equations. Dewey Class. No.: 515.43 DAS