Smith, Robert Leo. <br/><br/>
Elements of ecology / 
Robert Leo Smith, Thomas M. Smith. 
 - 4th edition update. 
 - USA :  Addison Wesley/ Longman ,  c2000. 
 - xx, 555 p. :  black and white ilustrations ;  26 cm. 
<br/><br/> Includes references, and index. 
<br/><br/><label>ISBN: </label>9814009318 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology.<br/>Ecology--Textbooks.<br/>Ecology--Study and teaching (Higher).
<br/><br/><label>Dewey Class. No.: </label>CIR 577.21 Sm658 2000