Gautam, Alka <br/><br/>
Aarthik bhugol ke mool tatva 

 - Allahabad    Pravalika Pabli.  2017 
 - 428 
<br/><br/><label>ISBN: </label>8186204571 
<br/><br/><label>Dewey Class. No.: </label>330.9  / al a