Click here to get started today!
The Nuttall Encyclopedia
A river of Central Russia, which rises in Orel and flows N., then E., then N. again, joining the Volga at Nijni-Novgorod after a course of over 700 m., navigable nearly all the way; on its banks are Orel, Kaluga, and Riazan, while Moscow stands on an affluent.
Wood, James, ed. Entry for 'Oka'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/o/oka.html. Frederick Warne & Co Ltd. London. 1900.