Columbia subject headings:
Africa--Emigration and immigration--Congresses.
Africa--Emigration and immigration--Economic aspects--Congresses.
Africans--Europe--Congresses.
Economic development--Africa--International cooperation--Congresses.
Europe--Emigration and immigration--Congresses.
Illegal immigration--Europe--Congresses.
Noncitizens--Europe--Congresses.
Harvard subject headings:
Africa--Emigration and immigration--Congresses.
Africa--Emigration and immigration--Economic aspects--Congresses.
Africans--Europe--Congresses.
Economic development--Africa--International cooperation--Congresses.
Europe--Emigration and immigration--Congresses
Illegal immigration--Europe--Congresses.
Noncitizens--Europe--Congresses.
Princeton subject headings:
Africa--Emigration and immigration--Congresses.
Africa--Emigration and immigration--Economic aspects--Congresses.
Africans--Europe--Congresses.
Economic development--Africa--International cooperation--Congresses.
Europe--Emigration and immigration--Congresses.
Illegal aliens--Europe--Congresses.