Columbia subject headings:
Harvard subject headings:
European Union countries--Emigration and immigration--Government policy--Congresses.
Refugees--Government policy--European Union countries--Congresses.
Princeton subject headings:
Crisis management--Europe.
Crisis management--Germany.
Europe--Emigration and immigration--History--21st century.
Germany--Emigration and immigration--History--21st century.
Refugees--Government policy--European Union countries.
Refugees--Government policy--Germany.