A.J.C. Grierson & D.G. Long

Royal Botanic Garden , Royal Government of Bhutan 1983-2001

v. 1, pt. 1 , v. 1, pt. 2 , v. 1, pt. 3 , v. 2, pt. 1 , v. 2, pt. 2 , v. 2, pt. 3 , v. 3, pt. 1 , v. 3, pt. 2 , v. 3, pt. 3

Available at 13 libraries