Columbia subject headings:
Latin America--Congresses.
Mexico--Congresses.
Harvard subject headings:
Latin America--Economic integration--Congresses.
Latin America--Foreign relations--Portugal--Congresses.
Latin America--Foreign relations--Spain--Congresses.
Latin America--Politics and government--1980---Congresses.
Portugal--Foreign relations--Latin America--Congresses.
Spain--Foreign relations--Latin America--Congresses.
Princeton subject headings:
Latin America--Economic integration--Congresses.
Latin America--Foreign relations--Portugal--Congresses.
Latin America--Foreign relations--Spain--Congresses.
Latin America--Politics and government--1980---Congresses.
Portugal--Foreign relations--Latin America--Congresses.
Spain--Foreign relations--Latin America--Congresses.