Columbia subject headings:
Vorkuta (Komi, Russia : Concentration camp)--History.
Vorkuta (Komi, Russia)--History.
Harvard subject headings:
Coal mines and mining--Soviet Union--History.
Forced labor--Russia (Federation)--Vorkuta (Komi)--History.
Forced labor--Soviet Union
Forced labor--Soviet Union--History
Labor camps--Soviet Union--History.
Mineral industries--Russia (Federation)--Vorkuta (Komi)--History.
Prisons--Soviet Union--History.
Vorkuta (Komi, Russia : Concentration camp)--History.
Vorkuta (Komi, Russia)--History.
Vorkuta (Komi, Russia)--Social life and customs.
Princeton subject headings:
Coal mines and mining--Soviet Union--History.
Forced labor--Soviet Union--History.
Labor camps--Soviet Union--History.
Prisons--Soviet Union--History.
Vorkuta (Komi, Russia : Concentration camp)--History.
Vorkuta (Komi, Russia)--History.
Vorkuta (Komi, Russia)--Social life and customs.