Columbia subject headings:
Harvard subject headings:
European Union countries--Emigration and immigration.
European Union countries--Ethnic relations.
Immigrants--European Union countries--Social conditions.
Immigrants--Government policy--European Union countries.
Treaty on European Union Protocols, etc.
Princeton subject headings:
European Union countries--Emigration and immigration.
European Union countries--Ethnic relations.
Immigrants--European Union countries--Social conditions.
Immigrants--Government policy--European Union countries.
Treaty on European Union Protocols, etc.