Columbia subject headings:
Harvard subject headings:
Monarchy--Spain--Congresses.
Monarchy--Spain--History--Congresses.
Representative government and representation--Spain--Congresses.
Republicanism--Spain--History--Congresses.
Spain--Politics and government--Congresses.
Princeton subject headings:
Monarchy--Spain--Congresses.
Representative government and representation--Spain--Congresses.
Spain--Politics and government--19th century--Congresses.
Spain--Politics and government--20th century--Congresses.