Columbia subject headings:
Central America--Foreign relations--1979-
Central America--Foreign relations--Mexico.
Mexico--Foreign relations--1970-1988.
Mexico--Foreign relations--Central America.
Harvard subject headings:
Central America--Foreign relations--1979-
Central America--Foreign relations--Mexico.
Mexico--Foreign relations--1970-1988.
Mexico--Foreign relations--Central America.
Princeton subject headings:
Central America--Foreign relations--1979-
Central America--Foreign relations--Mexico.
Mexico--Foreign relations--1970-1988.
Mexico--Foreign relations--Central America.