Grierson, A. J. C. <br/><br/>
Flora of Bhutan :  including a record of plants from Sikkim  
/ A.J.C. Grierson & D.G. Long. 
 - Edinburgh :   Royal Botanic Garden,  1987. 
 - v.1, part.3; 466-834 p.  illustrations;  20 cm. 
<br/><br/><label>ISBN: </label>0950427063 
<br/><br/><label>Dewey Class. No.: </label>582.13095498 GRI