Columbia subject headings:
Elite (Social sciences)--Portugal--History--Congresses.
Elite (Social sciences)--Spain--History--Congresses.
Monarchy--Portugal--History--Congresses.
Monarchy--Spain--History--Congresses.
Power (Social sciences)--Portugal--History--Congresses.
Power (Social sciences)--Spain--History--Congresses.
Harvard subject headings:
Elite (Social sciences)--Portugal--History--Congresses.
Elite (Social sciences)--Spain--History--Congresses.
Monarchy--Portugal--History--Congresses.
Monarchy--Spain--History--Congresses.
Nobility--Portugal--History--Congresses.
Nobility--Spain--History--18th century--Congresses.
Nobility--Spain--History--19th century--Congresses.
Nobility--Spain--History--Congresses.
Power (Social sciences)--Portugal--History--Congresses.
Power (Social sciences)--Spain--History--Congresses.
Spain--History--18th century--Congresses.
Spain--History--19th century--Congresses.
Princeton subject headings:
Elite (Social sciences)--Portugal--History--Congresses.
Elite (Social sciences)--Spain--History--Congresses.
Monarchy--Portugal--History--Congresses.
Monarchy--Spain--History--Congresses.
Nobility--Spain--History--18th century--Congresses.
Nobility--Spain--History--19th century--Congresses.
Power (Social sciences)--Portugal--History--Congresses.
Power (Social sciences)--Spain--History--Congresses.
Spain--History--18th century--Congresses.
Spain--History--19th century--Congresses.