Columbia subject headings:
Cuba--Foreign relations--United States.
Soviet Union--Foreign relations--United States.
United States--Foreign relations--1977-1981.
United States--Foreign relations--Cuba.
United States--Foreign relations--Soviet Union.
Harvard subject headings:
Cuba--Foreign relations--United States.
Soviet Union--Foreign relations--United States.
United States--Foreign relations--1977-1981.
United States--Foreign relations--Cuba.
United States--Foreign relations--Soviet Union.
Princeton subject headings:
Cuba--Foreign relations--United States.
Soviet Union--Foreign relations--United States.
United States--Foreign relations--1977-1981.
United States--Foreign relations--Cuba.
United States--Foreign relations--Soviet Union.