Kirkbride, Joseph H. <br/><br/>
Revision of the genus psyllocarpus (Rubiaceae) 
Joseph H. Kirkbride, Jr. 
 - City of Washington  Smithsonian Institution Press  1979 
 - 32p. ill. 27cm 
 - Smithsonian contributions to botany  no.41 .
<br/><br/><label>LCCN: </label>79-4631 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rubiaceae<br/>Botany--Amazon Valley