Agrawal, A N | Verma, H O | Gupta, R C <br/><br/>
India 
Agrawal, A N | Verma, H O | Gupta, R C 
 - New Delhi  National  1986 
 - 319p. 
<br/><br/><label>ISBN: </label>8121403324 
<br/><br/><label>Source: </label>Textbook