Columbia subject headings:
Harvard subject headings:
Isakov, Vladimir--Journeys--Russia (Federation)--Tverskai︠a︡ oblastʹ.
Isakov, Vladimir--Travel--Russia (Federation)--Tverskai͡a oblastʹ
Journalists--Soviet Union--Biography
Tverskai︠a︡ oblastʹ (Russia)--Description and travel.
Princeton subject headings:
Kalininskai︠a︡ oblastʹ (Russia)--Description and travel.
Volga River (Russia)--Description and travel.