Columbia subject headings:
Africa, Sub-Saharan--Economic conditions--Bibliography.
Africa, Sub-Saharan--Social conditions--Bibliography.
Harvard subject headings:
Africa, Sub-Saharan--Economic conditions--Bibliography.
Africa, Sub-Saharan--Social conditions--Bibliography.
Princeton subject headings:
Africa, Sub-Saharan--Economic conditions--Bibliography.
Africa, Sub-Saharan--Social conditions--Bibliography.