Ahsan, Zafar. <br/><br/>
Differential equations and their applications / 

 - New Delhi,  Prentice Hall,  c1999. 
 - x, 442p. ;  ill. ;  26 cm.  
<br/><br/><label>ISBN: </label>8120314972 
<br/><br/><label>Dewey Class. No.: </label>515.35  / 3634