Columbia subject headings:
Coinage--Russia (Federation)--Volga River Region--History.
Money--Russia (Federation)--Volga River Region--History.
Harvard subject headings:
Coinage--Russia (Federation)--Volga River Region--History.
Money--Russia (Federation)--Volga River Region--History.
Princeton subject headings:
Coins, Bulgarian--Russia (Federation)--Volga River Valley.
Coins, Turkish--Russia (Federation)--Volga River Valley.
Numismatics--Russia (Federation)--Volga River Valley--History.