Dahiya,Puspha <br/><br/>
Environmental science: a new approach / 
Dahiya,Puspha. 
 - New Delhi:  Narosa Publishing House,  2013. 
 - viii,7.26p.;24cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>9788184870756 
<br/><br/><label>Dewey Class. No.: </label>577 DAH