Columbia subject headings:
Acculturation--Congresses.
Germans--Foreign countries--History--20th century--Congresses.
Germany--Emigration and immigration--History--1933-1945--Congresses.
Political refugees--Germany--History--20th century--Congresses.
Harvard subject headings:
Acculturation--Congresses
Germans--Foreign countries--History--20th century--Congresses.
Germany--Emigration and immigration--History--1933-1945--Congresses.
Political refugees--Germany--History--20th century--Congresses.
Princeton subject headings:
Acculturation--Congresses.
Germans--Foreign countries--History--20th century--Congresses.
Germany--Emigration and immigration--History--1933-1945--Congresses.
Political refugees--Germany--History--20th century--Congresses.