Dressler, Robert L.,  1927- <br/><br/>
The orchids :  natural history and classification / 
Robert L. Dressler. 
 - Cambridge Mass :  Harvard University Press,  1981. 
 - 332 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliography and index. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0674875257 
<br/><br/><label>LCCN: </label>8024561  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Orchids.<br/>Orchids--Classification.<br/>Plants--Classification.