Columbia subject headings:
Africa--Foreign relations--1945-1960--Congresses.
Africa--Foreign relations--United States--Congresses.
United States--Foreign relations--1981-1989--Congresses.
United States--Foreign relations--Africa--Congresses.
Harvard subject headings:
Africa--Foreign relations--1960---Congresses.
Africa--Foreign relations--United States--Congresses.
United States--Foreign relations--1981-1989--Congresses.
United States--Foreign relations--Africa--Congresses.
Princeton subject headings:
Africa--Foreign relations--1940---Congresses.
Africa--Foreign relations--United States--Congresses.
United States--Foreign relations--1981---Congresses.
United States--Foreign relations--Africa--Congresses.