Columbia subject headings:
Harvard subject headings:
Hoch, Gerhard--Congresses.
World War, 1939-1945--Concentration camps--Germany--Congresses.
World War, 1939-1945--Germany--Prisoners and prisons--Congresses.
Princeton subject headings:
Hoch, Gerhard.
World War, 1939-1945--Concentration camps--Germany--Congresses.
World War, 1939-1945--Germany--Prisoners and prisons--Congresses.