Columbia subject headings:
China--Foreign relations--1949-
Soviet Union--Foreign relations--1945-1991.
United States--Foreign relations--1945-1989.
World politics--1945-1989.
Harvard subject headings:
China--Foreign relations--1949-1976.
International relations
Soviet Union--Foreign relations--1945-1991.
United States--Foreign relations--1945-
World politics--1945-
Princeton subject headings: