Columbia subject headings:
Harvard subject headings:
Africa, North--Foreign economic relations.
Africa, North--Foreign relations.
Africa, Sub-Saharan--Foreign economic relations.
Africa, Sub-Saharan--Foreign relations.
Africa--Economic conditions.
Africa--Economic integration.
Africa--Relations.
Princeton subject headings:
Africa, North--Foreign economic relations.
Africa, North--Foreign relations.
Africa, Sub-Saharan--Foreign economic relations.
Africa, Sub-Saharan--Foreign relations.
Africa--Economic conditions.
Africa--Economic integration.
Africa--Relations.