Columbia subject headings:
Mexico--Economic conditions--Congresses.
Mexico--Politics and government--Congresses.
Mexico--Relations--United States--Congresses.
United States--Relations--Mexico--Congresses.
Harvard subject headings:
Mexico--Foreign relations--1970-1988--Congresses.
Mexico--Politics and government--1970-1988--Congresses.
National security--Mexico--Congresses.
Princeton subject headings:
Mexico--Foreign relations--1970-1988--Congresses.
Mexico--Politics and government--1970-1988--Congresses.
National security--Mexico--Congresses.