Columbia subject headings:
Harvard subject headings:
Monarchy--Portugal--History.
Monarchy--Spain--History
Portugal--Colonies--Administration--History.
Portugal--Politics and government
Spain--Colonies--Administration--History.
Spain--Politics and government
Princeton subject headings:
Monarchy--Portugal--History.
Monarchy--Spain--History.
Portugal--Colonies--Administration--History.
Portugal--Politics and government.
Spain--Colonies--Administration--History.
Spain--Politics and government.