Smith, Robert Leo. <br/><br/>
Elements of ecology / 
Robert Leo Smith, Thomas M. Smith. 
 - 4th ed. 
 - Menlo Park, Calif. :  Benjamin Cummings,  1998. 
 - xix, 555 p. :  ill. (some col.), col. maps ;  26 cm. 
<br/><br/>Includes bibliogr. references (p. 507-521) and index 
<br/><br/><label>ISBN: </label>0321015185 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology