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