Columbia subject headings:
Spain--Autonomy and independence movements--Congresses.
Spain--History--Republic, 1931-1939--Congresses.
Harvard subject headings:
Spain--History--Autonomy and independence movements--Congresses.
Spain--Politics and government--1931-1939--Congresses.
Princeton subject headings:
Spain--History--Autonomy and independence movements--Congresses.
Spain--History--Republic, 1931-1939--Congresses.