Columbia subject headings:
Emigration and immigration--Government policy.
Emigration and immigration--Moral and ethical aspects.
Emigration and immigration--Political aspects.
Immigrants--Government policy.
Refugees--Government policy.
Harvard subject headings:
Europe--Emigration and immigration.
Social justice--Europe.
Princeton subject headings:
Emigration and immigration--Government policy.
Emigration and immigration--Moral and ethical aspects.
Emigration and immigration--Political aspects.
Immigrants--Government policy.
Refugees--Government policy.