Kapoor , N.M. <br/><br/>
Elements of Diffrential Equation 

 - New Delhi  Pitamber Publishing company Pvt. Ltd.  2009 
 - 324p. 
<br/><br/><label>ISBN: </label>81-209-1099-0 
<br/><br/><label>Dewey Class. No.: </label>515.35   Kap.N9