Columbia subject headings:
Harvard subject headings:
Palmella, duque de, 1781-1850.
Portugal--History--19th century.
Portugal--Politics and government--1826-1853.
Princeton subject headings:
Palmella, duque de, 1781-1850.
Portugal--Politics and government--1816-1826.
Portugal--Politics and government--1826-1853.
Statesmen--Portugal--Biography.