Columbia subject headings:
Harvard subject headings:
Europe--Emigration and immigration--Political aspects.
Immigrants--Europe--Forecasting.
Immigrants--Government policy--Europe.
Refugees--Government policy--Europe.
Princeton subject headings:
European Union countries--Emigration and immigration--Government policy.
New Left--Europe.
Political parties--European Union countries.
Refugees--Government policy--European Union countries.
Right and left (Political science)--European Union countries.