Columbia subject headings:
Harvard subject headings:
Anti-Nazi movement--Germany--History--20th century--Congresses.
Forced labor--Germany--History--20th century--Congresses.
Germany--History--1933-1945--Congresses.
Holocaust, Jewish (1939-1945)--Germany--Congresses.
Nazi concentration camps--Germany--History--Congresses.
Princeton subject headings:
Anti-Nazi movement--Germany--History--20th century--Congresses.
Forced labor--Germany--History--20th century--Congresses.
Germany--History--1933-1945--Congresses.
Holocaust, Jewish (1939-1945)--Germany--Congresses.
Nazi concentration camps--Germany--History--Congresses.