Orchidaceae in flora of tropical Africa  edited by Thiselton Dyer, R.A. Rolfe.. 

 - Dehra Dun  Bishen Singh Mahendra Pal Singh  1984 
 - xvi, 595 p. 23 cm. 
<br/><br/><label>Dewey Class. No.: </label>584.15096  / F59F