. "Vasyugan (Russian: \u0412\u0430\u0441\u044E\u0433\u0430\u0301\u043D) is a river in the southern West Siberian Plain of Russia. It is a tributary of the Ob River on the left side, and its course from its source in the Vasyugan Swamp is entirely within the Kargasok district of Tomsk Oblast."@en . .