Columbia subject headings:
Convict labor--Russia (Federation)--History.
Forced labor--Russia (Federation)--History.
Internment camps--Russia (Federation)--History.
Nazi concentration camps--Russia (Federation)--History.
White Sea-Baltic Canal (Russia)--History.
Harvard subject headings:
Internment camps--Soviet Union--History
White Sea-Baltic Canal (Russia)--History--Sources.
White Sea-Baltic Canal (Russia)--History.
Princeton subject headings: