Columbia subject headings:
Copper age--Russia (Federation)--Volga-Ural Region.
Excavations (Archaeology)--Russia (Federation)--Volga-Ural Region.
Neolithic period--Russia (Federation)--Volga-Ural Region.
Volga-Ural Region (Russia)--Antiquities.
Harvard subject headings:
Copper age--Russia (Federation)--Volga-Ural Region.
Excavations (Archaeology)--Russia (Federation)--Volga-Ural Region.
Neolithic period--Russia (Federation)--Volga-Ural Region.
Volga-Ural Region (Russia)--Antiquities.
Princeton subject headings: