Columbia subject headings:
Harvard subject headings:
Central America--Foreign economic relations--United States.
Central America--Foreign relations--United States.
Economic assistance, American--Central America
United States--Foreign economic relations--Central America.
United States--Foreign relations--Central America.
Princeton subject headings:
Central America--Foreign economic relations--United States.
Central America--Foreign relations--United States.
Economic assistance, American--Central America.
United States--Foreign economic relations--Central America.
United States--Foreign relations--Central America.