Townsend, Colin R. , <br/><br/>
Essentials of ecology / 
Colin R. Townsend, Michael Begon, John L. Harper. 
 - 3rd ed. 
 - xii, 510 pages :  color illustrations ;  25 cm. 
<br/><br/><label>ISBN: </label>9781405156585 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology.
<br/><br/><label>LC Class. No.: </label>QH541   / .T68 2008