Whittaker, Robert H. <br/><br/>
Communities and ecosystems / 
by Whittaker, Robert H. 
 - Ontario :  The Macmillan Company,  1972 
 - xi, 158 p.:  ill.  23 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology.
<br/><br/><label>Universal Decimal Class. No.: </label>307