Upadhyay, Arun Kumar. <br/><br/>
Sankhya siddhanta /  
NULL. 
 - /   . 
 - Delhi :   Nag publishers. 
 - NULL :   ills.,figs. ;   NULL .  
<br/><br/>NULL 
<br/><br/><label>ISBN: </label> RS95.00 (hb)