Columbia subject headings:
Harvard subject headings:
Artola, Miguel--Congresses.
Liberalism--Spain--Congresses.
Liberalism--Spain--History--Congresses.
Spain--Economic conditions--Congresses.
Spain--Politics and government--Congresses.
Spain--Social conditions--Congresses.
Princeton subject headings:
Artola, Miguel--Congresses.
Liberalism--Spain--Congresses.
Spain--Economic conditions--Congresses.
Spain--Politics and government--Congresses.
Spain--Social conditions--Congresses.