Columbia subject headings:
United States--Foreign relations--1945-1989.
United States--Foreign relations--1989-
Harvard subject headings:
United States--Foreign relations--1945-1989.
United States--Foreign relations--1989-
United States--Foreign relations--1989-1993.
Princeton subject headings:
Comparatve government.
United States--Foreign relations--1945-1989.
World politics--1945-1989.