Columbia subject headings:
Monarchy--Portugal.
Monarchy--Spain.
Portugal--Politics and government--17th century.
Portugal--Politics and government--18th century.
Spain--Politics and government--17th century.
Spain--Politics and government--18th century.
Harvard subject headings:
Monarchy--Portugal--History--17th century.
Monarchy--Portugal--History--18th century.
Monarchy--Spain--History--17th century.
Monarchy--Spain--History--18th century.
Princeton subject headings:
Monarchy--Portugal.
Monarchy--Spain.
Portugal--Politics and government--17th century.
Portugal--Politics and government--18th century.
Spain--Politics and government--17th century.
Spain--Politics and government--18th century.