Weier, T. Ellion,   1903-1991. <br/><br/>
Botánica /  
T. Ellion Weier, C. Ralph Stocking, Michael G. Barbour. 
 - 5a ed. 
 - México  :   Limusa,   1980. 
 - ix, 741 p.  
<br/><br/><label>ISBN: </label>968180161X 
<br/><br/><label>Dewey Class. No.: </label>581