Negi, P S <br/><br/>
Paristitiki avam paryavaran bhoogol (Hindi) 

 - 4th 
 - Meerut  Rastogi Publications  2014 
 - 487 
<br/><br/><label>ISBN: </label>93-5078-055-8 
<br/><br/><label>Dewey Class. No.: </label>304.28 NP: