Columbia subject headings:
Harvard subject headings:
Emigration and immigration law--Great Britain.
European Union countries--Emigration and immigration.
Great Britain--Emigration and immigration--Economic aspects.
Great Britain--Emigration and immigration--Government policy.
Great Britain--Emigration and immigration--Social aspects.
Great Britain--Emigration and immigration.
Princeton subject headings:
Emigration and immigration law--Great Britain.
European Union countries--Emigration and immigration.
Great Britain--Emigration and immigration--Economic aspects.
Great Britain--Emigration and immigration--Government policy.
Great Britain--Emigration and immigration--Social aspects.