Das, B. C., Differential calculus / B.C. Das, B.N. Mukherjee - 51 Rev. Ed. - Kolkata : U. N. Dhur & Sons, c2009. [reprint 2012] - xxxii, 592 p. : illus.; 18 cm. Includes index. ISBN: 8185624850 Subjects--Topical Terms: Calculus.Differential calculus.Mathematics. Dewey Class. No.: 515 / D2601d