Townsend, Colin R <br/><br/>
Essentials of ecology 

 - Massachusetts  Blackwell Science  2000 
 - xviii, 552p. : col. ill.  
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>632043482 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology<br/>Ecosystem