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Tributary of Red River in Vietnam
"Lo River" redirects here. For rivers in China, see Luo River (disambiguation).
World and Its Peoples: Eastern and Southern Asia: Volume 6 - Page 724 Marshall Cavendish Corporation - 2007 "RED RIVER The Red River (Song Hong in Vietnamese) rises in southwestern China and flows 750 miles ( 1,200 km) to ... Two major tributaries join the Red River: the Clear River (Song Lo) on the left bank and the Black River (Song Da) on ..."