Columbia subject headings:
Harvard subject headings:
Africa, West--Economic conditions--1960-
Africa, West--Economic integration.
Africa, West--Emigration and immigration.
Africa, West--Population.
Africa, West--Social conditions.
Africa, West--Statistics, Vital.
Princeton subject headings:
Africa, West--Economic conditions--1960-
Africa, West--Economic integration.
Africa, West--Emigration and immigration.
Africa, West--Population.
Africa, West--Social conditions.
Africa, West--Statistics, Vital.