Columbia subject headings:
Harvard subject headings:
Africa--Foreign relations--United States--Congresses.
South Africa--Foreign relations--United States--Congresses.
United States--Foreign relations--Africa--Congresses.
United States--Foreign relations--South Africa--Congresses.
Princeton subject headings:
Africa--Foreign relations--United States--Congresses.
South Africa--Foreign relations--United States--Congresses.
United States--Foreign relations--Africa--Congresses.
United States--Foreign relations--South Africa--Congresses.