Title: Nazvanii︠a︡ rek Oksko-Donskoĭ doliny
Subjects: Geographical Names, Slavic, Etymology, Hydronymy, Russian language
Places: Russia (Federation), Oka River Valley (Kurskai︠a︡ oblastʹ-Nizhegorodskai︠a︡ oblastʹ), Don River Valley