Columbia subject headings:
Central America--Foreign relations--United States.
Latin America--Relations--United States--Chronology.
United States--Foreign relations--Central America.
United States--Relations--Latin America--Chronology.
Harvard subject headings:
Central America--Foreign relations--United States.
Latin America--Foreign relations--United States.
United States--Foreign relations--Central America.
United States--Foreign relations--Latin America.
Princeton subject headings: