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Osyotr River (Russian: Осётр) is a river in Tula and Moscow Oblasts in Russia, a right tributary of the Oka River. The length of the river is 228 km. The area of its basin is 3,480 km². The Osyotr freezes up in November and stays icebound until the first half of April. The town of Zaraysk is located on the Osyotr River.
References
Osyotr River Wikipedia(Text) CC BY-SA