Columbia subject headings:
Russia (Federation)--Antiquities.
Tverskai︠a︡ oblastʹ (Russia)--Antiquities.
Tverskai︠a︡ oblastʹ (Russia)--History.
Harvard subject headings:
Russia (Federation)--Antiquities.
Tverskai︠a︡ oblastʹ (Russia)--Antiquities.
Tverskai︠a︡ oblastʹ (Russia)--History.
Princeton subject headings:
Kalininskai︠a︡ oblastʹ (Russia)--History.