Wright,Richard T. <br/><br/>
Environmental Science:  Toward a sustainable Future 
Richard T.Wright 
 - 8th ed 
 - New Delhi  Prentice-Hall  2002 
 - 681p. 
<br/><br/> P.B 
<br/><br/><label>ISBN: </label>812032157x 
<br/><br/><label>Dewey Class. No.: </label>363.7 WRI