Columbia subject headings:
Harvard subject headings:
Democracy--European Union countries--Congresses.
European Union countries--Emigration and immigration--Government policy--Congresses.
European Union countries--Social policy--Congresses.
Solidarity--European Union countries--Congresses.
Princeton subject headings:
Democracy--European Union countries--Congresses.
European Union countries--Emigration and immigration--Government policy--Congresses.
European Union countries--Social policy--Congresses.
Solidarity--European Union countries--Congresses.