Wright, Richard T <br/><br/>
Environmental Science   : Toward a Sustainable Future 
/ by Richard T Wright 
 - 10th ed. 
 - New Delhi:  PHI Learning Private Limited,   2008.  
 - 704p.  
<br/><br/><label>ISBN: </label>9788120336902  
<br/><br/><label>Dewey Class. No.: </label>333.707   / WRI/E