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

 - New York :  Harper & Row,  1977 
 - 497 p.  : ilus. 
<br/><br/><label>LCCN: </label>58179 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biología.<br/>Ecología.
<br/><br/><label>Dewey Class. No.: </label>581.5  / S5