Voyage d'exploration en Indo-Chine effectue pendant les annees 1866, 1867 et 1868 par une commission francaise

Rhinoceros horns are among the products of the wild tribes living in the mountains around the left bank of the [Mekong] river, and this forms together with their other products about half of the business in Bassac, Attopeu, Stung Treng and Khong.