Columbia subject headings:
Africa, Sub-Saharan--Economic conditions--1960-
Africa, Sub-Saharan--Social conditions--1960-
Migration, Internal--Africa, Sub-Saharan.
Urbanization--Africa, Sub-Saharan.
Harvard subject headings:
Africa, Sub-Saharan--Economic policy.
Africa, Sub-Saharan--Emigration and immigration.
Immigrants--Africa, Sub-Saharan.
Princeton subject headings: