Smith, Robert Leo. <br/><br/>
Elements of ecology / 
Robert Leo , Smith. 
 - 3rd ed. 
 - New York :  Harper Collins,  1992. 
 - xvii, 617 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0060463287 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology.
<br/><br/><label>Dewey Class. No.: </label>574.5 SMI