Williams, Louis O. <br/><br/>
The Orchidaceae of Mexico/ 
Louis O. Williams 
 - p.1-321 ;  23 cm. 
<br/><br/> IN: Ceiba vol. 2, p. 1-321 (1951). 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Orchids--Mexico--Classification.