Columbia subject headings:
Spain--Foreign relations--1975---Congresses.
Spain--History--1975---Congresses.
Spain--Politics and government--1975-1982--Congresses.
Harvard subject headings:
Spain--Economic conditions--1975-
Spain--Economic conditions--1975-2008.
Spain--Politics and government--1975-1982.
Princeton subject headings:
Spain--Economic conditions--1975-.
Spain--Politics and government--1975-.