Columbia subject headings:
Africa, Sub-Saharan--Economic conditions.
Africa, Sub-Saharan--Population.
Demography--Africa, Sub-Saharan.
Harvard subject headings:
Africa, Sub-Saharan--Economic conditions.
Africa, Sub-Saharan--Population.
Princeton subject headings:
Africa, Sub-Saharan--Economic conditions.
Africa, Sub-Saharan--Population--Statistics.