Columbia subject headings:
Bertek Valley (Russia)--Antiquities.
Excavations (Archaeology)--Russia (Federation)--Bertek Valley.
Harvard subject headings:
Bertek Valley (Russia)--Antiquities.
Excavations (Archaeology)--Russia (Federation)--Bertek Valley.
Princeton subject headings:
Altai Mountains--Antiquities.
Excavations (Archaeology)--Altaĭ Mountains.
Mounds--Altaĭ Mountains.