Region
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Bulgaria
7
Kazanʹ (Russia)
7
Saratovskai︠a︡ oblastʹ (Russia)
7
Ulʹi︠a︡novskai︠a︡ oblastʹ
7
Volga Valley
7
Vyatka River Region
7
Astrakhanskai︠a︡ oblastʹ
6
Kievan Rus
6
Volga, Région de la (Russie)
6
Caucasus, Northern
5
Eurasia
5
I︠A︡roslavskai︠a︡ oblastʹ (Russia)
5
Kama River Valley (Russia)
5
Kazanʹ
5
Oka River Valley (Kurskai︠a︡ oblastʹ-Nizhegorodskai︠a︡ oblastʹ, Russia)
5
Saratovskai͡a oblastʹ (Russia)
5
Ukraine
5
Ulʹi︠a︡novskai︠a︡ oblastʹ (Russia)
5
Volgogradskai͡a oblastʹ
5
A.S.S.R. Nemt͡sev Povolzhʹi͡a
4
A.S.S.R. Nem︠t︡sev Povolzhʹ︠i︡a (R.S.F.S.R.)
4
Astrakhanskai︠a︡ oblastʹ (Russia)
4
Bulgar (Extinct city)
4
Caucasus, Northern (Russia)
4
Germany
4
Kama River
4
Oka River Valley (Kurskai︠a︡ oblastʹ-Nizhegorodskai︠a︡ oblastʹ)
4
Penzenskai͡a oblastʹ
4
Ukek (Extinct city)
4
United States
4
Ural River Valley (Russia and Kazakhstan)
4
Volga Region
4
Volga River region
4
Volga, Vallée de la (Russie)
4
Volga-Oural, Région
4
Volgogradskai︠a︡ oblastʹ
4
Caspian Sea
3
Caucasus
3
Central Chernozem Region
3
China
3
I͡Aroslavskai͡a oblastʹ (Russia)
3
I︠A︡roslavskai︠a︡ oblastʹ
3
Kama River Valley
3
Kazanskai︠a︡ gubernii︠a︡
3
Kuban River Region (Georgia and Russia)
3
Kyivan Rus
3
Middle East
3
Nizhegorodskai︠a︡ oblastʹ
3
Oka River Region (Kurskai͡a oblastʹ-Nizhegorodskai͡a oblastʹ)
3
Oka River Region (Kurskai͡a oblastʹ-Nizhegorodskai͡a oblastʹ, Russia)
3
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