found: Development potential for international shipping on the Lancang-Mekong River (China, Lao PDR, Myanmar, and Thailand), 2016, 2016:t.p. (Lancang-Mekong River) p. 8 (Lancang-Mekong (LM) River originates in the Tanggula Mountain Range on the Qinghai-Tibet Plateau and runs approximately 4,880 kilometers (km) through Yunnan Province of China, southward through Myanmar, the Lao PDR, Thailand, Cambodia, and Vietnam. This is a transboundary waterway that is the seventh-longest river in Asia)
found: Mekong River Commission website, May 8, 2019(Mekong River is one of the world's great river systems, flowing 4,909 km through six countries: China, Myanmar, Thailand, Lao PDR, Cambodia, and Viet Nam)
found: Wikipedia, May 8, 2019(Mekong is a transboundary river in Southeast Asia. It is the world's twelfth longest river and the seventh longest in Asia. Its estimated length is 4,350 km (2,703 mi), and it drains an area of 795,000 km2 (307,000 sq mi), discharging 475 km3 (114 cu mi) of water annually. From the Tibetan Plateau the river runs through China's Yunnan Province, Myanmar, Laos, Thailand, Cambodia, and Vietnam)
found: GEOnet, May 8, 2019(Mekong River; short: Mekong; Mae Nam Khong [approved] Thailand (TH); Mènam Khong [approved] Laos (LA); Lancang Jiang [approved] China (CH); Mékôngk [approved] Cambodia (CB); Mekong River [approved] Burma (BM); Sông Tiền Giang [approved] Vietnam (VM); variants: Cambodia River, Song Cuu Long, Cuu Long Giang, Dachu, Dza-chu, Nam Hkawng, Maenam Kaung, Menam Kaung, Mei Nam Kong, Me Nam Kong, Lan-Chan Chiang, Lang Tsang Kiang, Lantsan, Lan-ts'ang Chiang, Lantsang Kiang, Lan-tsan Kiang, Lan Tsiang Kiang, Mègaung Myit, Mei Chiang, Mei-Kung Ho, Mekon, Mae Nam Phong, Tonle Thom, Song Tien, Sông Tién Giang; STM, 10° 15' 00" N, 105° 55' 00" E; a stream flowing through Burma (BM), Cambodia (CB), China (CH), Laos (LA), Thailand (TH), Vietnam (VM))