Columbia subject headings:
Harvard subject headings:
Concentration camps--Germany--Hannover.
Forced labor--Germany--Hannover.
Prisoners--Germany--Hannover.
World War, 1939-1945--Germany--Hannover.
Princeton subject headings:
Forced labor--Germany--Hannover.
Nazi concentration camps--Germany--Hannover.
Prisoners--Germany--Hannover.
World War, 1939-1945--Germany--Hannover.