Columbia subject headings:
Harvard subject headings:
Democratization--Spain--History--20th century--Congresses.
Political parties--Spain--History--20th century--Congresses.
Spain--History--1975---Congresses.
Spain--Politics and government--1975-1982--Congresses.
Princeton subject headings:
Democratization--Spain--History--20th century--Congresses.
Political parties--Spain--History--20th century--Congresses.
Spain--Politics and government--1975-1982--Congresses.