Columbia subject headings:
Harvard subject headings:
Africa, Sub-Saharan--Commercial policy.
Africa, Sub-Saharan--Foreign economic relations--United States.
Foreign trade promotion--United States.
United States--Foreign economic relations--Africa, Sub-Saharan.
Princeton subject headings:
Africa, Sub-Saharan--Commercial policy.
Africa, Sub-Saharan--Foreign economic relations--United States.
Foreign trade promotion--United States.
United States--Foreign economic relations--Africa, Sub-Saharan.