Whittaker, Robert H.  1920- <br/><br/>
Communities and ecosystems / 
Robert H. Whittaker 
 - 2nd ed. 
 - New York :  MacMillan,  1975 
 - 387 p. :  ill. ;  23 cm. 
<br/><br/><label>ISBN: </label>0024273902 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology