Shashi Shyam Singh <br/><br/>
Samajik Vigyan Hindi Vishwakosh Vol.2 

 - 3rd 
 - New Delhi  Kithabgar Prakashan  2012 
 - 359 
<br/><br/><label>ISBN: </label>8170162467 
<br/><br/><label>Dewey Class. No.: </label>300.3 SHA