Nigam, S. P. A text book of differential calculus / by S. P. Nigam, H. C. Sinha and J. C. Sharma - Agra : Ram Prasad, 1966 - 407 p. ; 22 cm. Subjects--Topical Terms: CalculusMathematicsMathematical analysisFunctions Dewey Class. No.: 517.2