Purnima Smarath <br/><br/>
Paryavarana shasthram (Environmental studies) 

 - Ludhiana  Kalyani Publishers  2007 
 - 238p. 
<br/><br/><label>ISBN: </label> RS 100.00 
<br/><br/><label>Source: </label> RS 100.00 
<br/><br/><label>Dewey Class. No.: </label>304.2 PUR