The Imperiia Project: a spatial history of the Russian Empire

Oka River

Like the Volga, the Oka waters 8 provinces. It flows 1,400 versts.
Right-bank tributaries: the Zusha, Upa, Ostre, Pronia, Moksha, Tsna, and Tiusha rivers
Left-bank tributaries: the Nugra, Zhizdra, Ugra, Protva, Nara, Moskva, and Kliaz'ma rivers

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