Columbia subject headings:
Harvard subject headings:
Bulgars (Turkic people)--Russia (Federation)--Volga River Region--Antiquities.
Excavations (Archaeology)--Russia (Federation)--Volga River Region
Volga River Region (Russia)--Antiquities.
Volga River Region (Russia)--Civilization.
Princeton subject headings:
Bulgars (Turkic people)--Russia (Federation)--Volga River Region--Antiquities.
Excavations (Archaeology)--Russia (Federation)--Volga River Region.
Volga River Region (Russia)--Antiquities.