Columbia subject headings:
Russian language--Dialects--Russia (Federation)--Tverʹ--History.
Russian language--Dialects--Russia (Federation)--Tverʹ.
Harvard subject headings:
Russian language--Dialects--Russia (Federation)--Tverʹ--History.
Russian language--Dialects--Russia (Federation)--Tverʹ.
Princeton subject headings:
Russian language--Dialects--Russia (Federation)--Tverʹ--History.
Russian language--Dialects--Russia (Federation)--Tverʹ.