Columbia subject headings:
Harvard subject headings:
Concentration camps--Soviet Union--History--Sources.
Forced labor--Russia (Federation)--Vorkuta (Komi)--History--Sources.
Political prisoners--Russia (Federation)--Vorkuta (Komi)--Personal narratives.
Strikes and lockouts--Prisons--Russia (Federation)--Vorkuta (Komi)--History.
Vorkuta (Komi, Russia : Concentration camp)--History--Sources.
Princeton subject headings:
Forced labor--Russia (Federation)--Vorkuta (Komi)--History.
Internment camps--Russia (Federation)--Vorkuta (Komi)--History.
Vorkuta (Komi, Russia : Concentration camp)--History.
Vorkuta (Komi, Russia)--History.