Usher, George. <br/><br/>
A dictionary of plants used by man 

 - London :  Constable,  1974 
 - 619 p. 
<br/><br/><label>LCCN: </label>44955 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botánica económica--Diccionarios.
<br/><br/><label>Dewey Class. No.: </label>581.603  / U8