Hall, Harvey Monroe. <br/><br/>
Rubber-content of North American plants 

 - Washington :  Carnegie Institution,  1921 
 - 65 p.  : ilus. 
 - Publication  ; 313 .
 - Publication  ; 313 .
<br/><br/><label>LCCN: </label>24537 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultura--Trópicos.<br/>Caucho.
<br/><br/><label>Dewey Class. No.: </label>633.895  / H35