Yadav, Gyan Chand <br/><br/>
Gyan vigyan 

 - 1st 
 - New Delhi  Vigyan Publishing House  2017 
 - 356p. 
<br/><br/> 58665 
<br/><br/><label>ISBN: </label> 380 
<br/><br/><label>Dewey Class. No.: </label>001.76 YAD G