Bhutan: Sources Aris (1979). "Bhutan: The Early History of a Himalayan Kingdom", by Michael Aris (Warminster: Aris & Phillips, 1979). Petech (1972). "The Rulers of Bhutan c. 1650-1750," by Luciano Petech in Oriens Extremus, vol. 19 (1972), pp. 203-213. Tibetan and Himalayan Digital Library. THDL Extended Wylie Transliteration Scheme (web site). Last visited 12 May 2008. Last updated on: 29 Dec 2009 21:00:00