Dhingra Ishwar <br/><br/>
vyashtigat arthik Siddhant 

 - New Delhi  Sultan Chand & Sons  2008 
 - 500p 
<br/><br/><label>ISBN: </label>81-8054-600-4 
<br/><br/><label>Dewey Class. No.: </label>330 1H   Dhi P8