Robert H.Whittker <br/><br/>
Communities and Ecosystems 

 - 2nd ed 
 - Newyork  Macmillam pub co  1975 
 - xviii,385p 
<br/><br/><label>ISBN: </label>0-02-4273390-2 
<br/><br/><label>Dewey Class. No.: </label>574.524