Columbia subject headings:
Brazil--History--19th century.
John VI, King of Portugal, 1767-1826.
Portugal--History--John VI, 1816-1826.
Harvard subject headings:
Brazil--History--19th century.
John VI, King of Portugal, 1767-1826
Portugal--History--John VI, 1816-1826.
Princeton subject headings:
Brazil--History--19th century.
John VI, King of Portugal, 1767-1826.
Portugal--History--John VI, 1816-1826.