Gupta,R.L & Gupta.V.K <br/><br/>
Company Lekhankan 

 - New Delhi  Sultan Chand &Sons  2008 
 - D-1-F-62.SP1-SP88,S. 
<br/><br/><label>ISBN: </label>81-8054-709-6 
<br/><br/><label>Dewey Class. No.: </label>657.95H   Gup.P8