1) Asian river 2) European river 3) European watercourse 4) European waterway 5) River in Europe 6) River in Russia 7) River in Asia 8) River of Asia 9) River of Russia 10) Russian waterway 11) Russian watercourse 12) Russian river 13) Watercourse in Russia 14) Waterway in Europe 15) Watercourse in Europe 
Kolva is a cultivated variety of potato.