Akhtar, Ahsan. <br/><br/>
Textbook of differential calculus /  
Ashan Akhtar and Sabiha Ashan. 
 - 2nd ed. 
 - New Delhi :   PHI Learning ,   2009. 
 - xviii, 451 p. ;   27 cm. 
<br/><br/>Includes bibliographical referrences and index. 
<br/><br/><label>ISBN: </label> RS350.00 (pbk) 
<br/><br/><label>Subjects--Index Terms: </label>DIFFERENTIAL CALCULUS 
<br/><br/><label>Dewey Class. No.: </label>515.33  / AKH/T