Verdcourt, Bernard, <br/><br/>
Flora of Tropical East Africa - Boraginaceae (1991) : 

 -  CRC Press,  1991. 
 - 132 pages 
<br/><br/><label>ISBN: </label>9789061913542 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science.
<br/><br/><label>Dewey Class. No.: </label>581.70913  / POL