Columbia subject headings:
Harvard subject headings:
Concentration camp inmates--Europe--Congresses.
Concentration camp inmates--Germany--Congresses.
Forced labor--Europe--Congresses.
Germany--History--1933-1945--Congresses.
Germany--Politics and government--1933-1945--Congresses.
Holocaust, Jewish (1939-1945)--Congresses
Prisoners of war--Europe--Congresses.
Slave labor--Europe--Congresses.
World War, 1939-1945--Conscript labor--Europe--Congresses.
Princeton subject headings:
Forced labor--Germany--History--20th century--Congresses.
World War, 1939-1945--Concentration camps--Germany--Congresses.
World War, 1939-1945--Conscript labor--Germany--Congresses.
World War, 1939-1945--Prisoners and prisons, German--Congresses.