Das B.C. Differential Calculus - 51st ed. - Kolkata: U.N.Dhur and Sons, Private LTD; 2009. - xxxii,592 p. : ill. Dia.,Chart,Tab.,pic.; 21 cm. Includes Index. Differential Calculus English ISBN: 818624850 Subjects--Topical Terms: Mathmatics Dewey Class. No.: 515.33 / D229d/2017