Columbia subject headings:
Harvard subject headings:
Asylums--Law and legislation--Europe.
Emigration and immigration law--Europe.
Europe--Emigration and immigration--Government policy.
Europe--Emigration and immigration--Political aspects.
Europe--Emigration and immigration.
Princeton subject headings:
Asylums--Law and legislation--Europe.
Emigration and immigration law--Europe.
Europe--Emigration and immigration--Government policy.
Europe--Emigration and immigration--Political aspects.
Europe--Emigration and immigration.