Southwick, Charles H. <br/><br/>
Ecology and the quality of our environment / 

 - 2d ed. 
 - New York :  Van Nostrand,  c1976. 
 - xxi, 426 p. : 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0442279213 
<br/><br/><label>Dewey Class. No.: </label>301.31  / SOU