Columbia subject headings:
Harvard subject headings:
Central America--Foreign relations--United States.
Competition, International.
Soviet Union--Foreign relations--1975-1985
United States--Commercial policy.
United States--Foreign relations--Central America.
Princeton subject headings:
Central America--Foreign relations--United States.
Competition, International.
Soviet Union--Foreign relations--1975- .
United States--Commercial policy.
United States--Foreign relations--Central America.