Ricklefs, Robert E. <br/><br/>
The economy of nature :  a textbook in basic ecology / 
Robert E. Ricklefs. 
 - 4th ed. 
 - New York :  W.H. Freeman,  c1997. 
 - viii, 678 p. :  ill. (some col.) ;  26 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>071672815X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology.