Akhtar, Ahsan. A Textbook on Differential Calculus - 3rd ed. - Delhi : PHI Learning Private Limited, 2025. - xx, 483p. : ill. ; 21 cm. Includes Index. ISBN: 9789389347715 Subjects--Topical Terms: Probabilities and Applied Mathematics Dewey Class. No.: 515.33 A313t 2025