Columbia subject headings:
Humanitarianism--Africa.
Voluntarism--Africa.
Harvard subject headings:
Africa--Economic conditions.
Africa--Foreign relations.
Africa--Politics and government.
Africa--Social conditions.
Urban geography.
Princeton subject headings:
Africa--Economic conditions.
Africa--Foreign relations.
Africa--Politics and government.
Africa--Social conditions.
Humanitarianism--Africa.
Social service--Africa.
Urban geography.
Voluntarism--Africa.