Columbia subject headings:
Spain--Foreign relations--1975---Congresses.
Spain--Politics and government--1975-1982--Congresses.
Harvard subject headings:
Democratization--Congresses.
Spain--Administrative and political divisions--Congresses.
Spain--Economic conditions--1975---Congresses.
Spain--Foreign relations--1975---Congresses.
Spain--Politics and government--1975-1982--Congresses.
Princeton subject headings:
Spain--Foreign relations--1975---Congresses.
Spain--Politics and government--1975---Congresses.