Gupta  .S.P. And  Gupta.Uma. <br/><br/>
Sankhiki ke Sidhant 

 - New Delhi  Sultan and Sons  2007 
 - 576p. 
<br/><br/><label>ISBN: </label>81-8054- 457-5 
<br/><br/><label>Dewey Class. No.: </label>519.5H                       G