Columbia subject headings:
Harvard subject headings:
European Union countries--Emigration and immigration--Congresses.
Foreign workers--European Union countries--Congresses.
Labor market--European Union countries--Congresses.
Labor policy--European Union countries--Congresses.
Migrant labor--European Union countries--Congresses.
Princeton subject headings:
European Union countries--Emigration and immigration--Congresses.
Foreign workers--European Union countries--Congresses.
Labor market--European Union countries--Congresses.
Labor policy--European Union countries--Congresses.
Migrant labor--European Union countries--Congresses.