Columbia subject headings:
Harvard subject headings:
European Union countries--Emigration and immigration.
Foreign workers--Government policy--European Union countries.
Germany--Emigration and immigration.
Immigrants--Employment--European Union countries.
Labor mobility--Europe.
Labor mobility--European Union countries.
Labor policy--Europe.
Noncitizens--Civil rights--European Union countries.
Princeton subject headings:
European Union countries--Emigration and immigration--Government policy.
European Union countries--Emigration and immigration.
Foreign workers--Government policy--European Union countries.
Germany--Emigration and immigration.
Immigrants--Employment--European Union countries.
Noncitizens--Civil rights--European Union countries.