Columbia subject headings:
Africa--Foreign economic relations--United States.
Foreign trade promotion--United States.
Investments, American--Africa.
United States--Foreign economic relations--Africa.
Harvard subject headings:
Africa--Foreign economic relations--United States.
Foreign trade promotion--United States.
Investments, American--Africa.
United States--Foreign economic relations--Africa.
Princeton subject headings:
Africa--Foreign economic relations--United States.
Foreign trade promotion--United States.
Investments, American--Africa.
United States--Foreign economic relations--Africa.