Academic Amer. encyc., c1989 v. 18, p. 76h (Souphanouvong; Prince Souphanouvong; b. 1902; served as head of Lao People's Democratic Republic, 1975-1986; studied engineering in France; joined Pathet Lao forces and became their leader; included in coal. govt. under his half brother, Prince Souvanna Phouma, whom he ousted)
Čhao Suphānuwong, phūnam patiwat, 1990 p. 8, 1st group (Comrade Suphānuwong was born on 13 Karadākhom 1909, Louangphrabang, Laos, and celebrated his 80th birthday on 13 Karadākhom 1989)
Encyc. Amer., c1990 v. 25, p. 260 (Souphanouvong, Prince, 1909?-)
Encyc. Brit., c1972 v. 13, p. 713 (Prince Souphanouvong)