Columbia subject headings:
Harvard subject headings:
Europe--Emigration and immigration--Political aspects--Congresses.
Immigrants--Germany--Congresses.
Race discrimination--Germany--Congresses.
Racism--Germany--Congresses.
Refugees--Germany--Congresses.
Refugees--Government policy--Germany--Congresses.
Social psychology--Germany--Congresses.
Xenophobia--Germany--Congresses.
Princeton subject headings:
Europe--Emigration and immigration--Political aspects--Congresses.
Immigrants--Germany--Congresses.
Race discrimination--Germany--Congresses.
Racism--Germany--Congresses.
Refugees--Germany--Congresses.
Refugees--Government policy--Germany--Congresses.
Social psychology--Germany--Congresses.
Xenophobia--Germany--Congresses.