Columbia subject headings:
Harvard subject headings:
Germany (East)--Politics and government--Sources.
Internment camps--Germany (East)--History--Sources
Political prisoners--Germany (East)--History--Sources.
Political prisoners--Germany (East)--History.
Soviet Union. Ministerstvo vnutrennikh del--Sources.
Soviet Union. Narodnyĭ komissariat vnutrennikh del--History--Sources.
World War, 1939-1945--Prisoners and prisons, Russian--History--Sources.
Princeton subject headings:
GULag NKVD--History--Sources.
Internment camps--Germany (East)--History--Sources.
Political prisoners--Germany (East)--History--Sources.
World War, 1939-1945--Prisoners and prisons, Russian--History--Sources.