Columbia subject headings:
Africa--Civilization.
Africa--History--21st century.
Africa.
Harvard subject headings:
Africa--Civilization.
Africa--Economic conditions--21st century.
Africa--Foreign relations.
Africa--History--21st century.
Africa--History.
Africa--Intellectual life.
Africa--Politics and government--21st century.
Africa--Social conditions--21st century.
Africa.
Princeton subject headings:
Africa--Civilization.
Africa--History--21st century.
Africa.