Columbia subject headings:
Harvard subject headings:
Brazil--History.
Brazil--Relations--Portugal--History--19th century.
Brazil--Relations--Portugal--History--20th century.
Brazil--Relations--Portugal.
Portugal--History.
Portugal--Relations--Brazil--History--19th century.
Portugal--Relations--Brazil--History--20th century.
Portugal--Relations--Brazil.
Princeton subject headings:
Brazil--History.
Brazil--Relations--Portugal.
Portugal--History.
Portugal--Relations--Brazil.