THE ORCHIDS: scientific studies 
/edited by Carl L.Withner 
 - New York  John Wiley  1974 
 - xii, 604 p. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>471957151 
<br/><br/><label>Dewey Class. No.: </label>584.15  / ORC