Townsend, Colin R. <br/><br/>
Essentials of ecology 
by Colin R. Townsend, Michael Begon and John L. Harper 
 - 2nd ed. 
 - Oxforf  Blackwell Publishing  2003 
 - xiii, 530p. 
<br/><br/><label>ISBN: </label>1-4051-4933-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology
<br/><br/><label>Dewey Class. No.: </label>577  / TOW/E