Gupta, P P <br/><br/>
Methematical methods 

 - 3rd ed 
 - Meerut  Pragati Prakashan  2000 
 - 348 
<br/><br/><label>ISBN: </label>81-7556-163-7 
<br/><br/><label>Dewey Class. No.: </label>515.5 G959