Columbia subject headings:
Nationalism--Portugal--History.
Nationalism--Spain--History.
Harvard subject headings:
Nationalism--Portugal--Congresses.
Nationalism--Portugal--History.
Nationalism--Spain--Congresses.
Nationalism--Spain--History
Spain--History--19th century--Historiography--Congresses.
Spain--History--20th century--Historiography--Congresses.
Princeton subject headings:
Nationalism--Portugal--History.
Nationalism--Spain--History.