Columbia subject headings:
Harvard subject headings:
Africa, Sub-Saharan--Foreign economic relations--United States.
Economic assistance, American--Africa, Sub-Saharan.
Foreign trade regulation--United States.
Investments, American--Africa, Sub-Saharan.
Investments, American--Law and legislation.
United States--Foreign economic relations--Africa, Sub-Saharan.
Princeton subject headings:
Africa, Sub-Saharan--Foreign economic relations--United States.
Foreign trade regulation--United States.
Investments, American--Africa, Sub-Saharan.
Investments, American--Law and legislation.
United States--Foreign economic relations--Africa, Sub-Saharan.