Whittaker, Robert H.  1920- <br/><br/>
Communities and ecosystems / 
by Robert H. Whittaker 
 - New York :  MacMillan,  1970 
 - xi, 162 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology