Smith, Robert Leo. <br/><br/>
Elements of ecology 

 - 4th Ed.  
 -  The Benjamin/Cummings Publishing Company Inc. New York 
<br/><br/><br/>English 
<br/><br/><label>ISBN: </label>0-321-01518-5 
<br/><br/><label>Dewey Class. No.: </label>577 SMI  / SMI