Columbia subject headings:
Nazi concentration camps--Germany.
Prisoners of war--Germany.
Russians--Germany.
World War, 1939-1945--Prisoners and prisons, German.
Harvard subject headings:
Forced labor--Germany--History--20th century
Germany--History--1933-1945.
Prisoners of war--Germany
Prisoners of war--Soviet Union.
World War, 1939-1945--Conscript labor--Germany.
World War, 1939-1945--Prisoners and prisons, German.
World War, 1939-1945--Prisoners and prisons, Soviet.
Princeton subject headings:
Nazi concentration camps--Germany.
Prisoners of war--Germany.
Russians--Germany.
World War, 1939-1945--Prisoners and prisons, German.