Columbia subject headings:
Harvard subject headings:
European Union countries--Emigration and immigration--Congresses.
European Union countries--Emigration and immigration--Government policy--Congresses.
Immigrants--European Union countries--Congresses.
Refugees--European Union countries--Congresses.
Social integration--European Union countries--Congresses.
Princeton subject headings:
Border security--Europe.
Europe--Emigration and immigration.
Refugees--Europe.
Refugees--Government policy--Europe.
Social change--Europe.