Billjngs w .d. <br/><br/>
Plants, man, and ecosystem 

 -  macmillan  1964 
<br/><br/><label>ISBN: </label>333 14633 6 
<br/><br/><label>LC Class. No.: </label>581.520/BIL 
<br/><br/><label>Dewey Class. No.: </label>581.520/BIL