Columbia subject headings:
Harvard subject headings:
Russia--History.
Soviet Union--History.
Tverskai︠a︡ oblastʹ (Russia)--Economic conditions.
Tverskai︠a︡ oblastʹ (Russia)--History.
Tverskai︠a︡ oblastʹ (Russia)--Politics and government.
Princeton subject headings:
Russia--History.
Soviet Union--History.
Tverskai︠a︡ oblastʹ (Russia)--Economic conditions.
Tverskai︠a︡ oblastʹ (Russia)--History.
Tverskai︠a︡ oblastʹ (Russia)--Politics and government.