Columbia subject headings:
Africa, North--Emigration and immigration--Economic aspects.
Africa, North--Emigration and immigration--Government policy.
Africa, North--Foreign relations--Europe.
Europe--Emigration and immigration--Economic aspects.
Europe--Emigration and immigration--Government policy.
Europe--Foreign relations--Africa, North.
Harvard subject headings:
Africa, North--Emigration and immigration--Government policy.
European Union countries--Emigration and immigration--Government policy.
Princeton subject headings:
Africa, North--Emigration and immigration--Economic aspects.
Africa, North--Emigration and immigration--Government policy.
Africa, North--Foreign relations--Europe.
Europe--Emigration and immigration--Economic aspects.
Europe--Emigration and immigration--Government policy.
Europe--Foreign relations--Africa, North.