Gupta,S.P and Gupta,Uma <br/><br/>
Sankhyiki ke siddhant 

 - New Delhi  Sultan Chand and sons  2007 
 - 710p. 
<br/><br/><label>ISBN: </label>81-8054-523-7 
<br/><br/><label>Dewey Class. No.: </label>519.5H    Gup.P7