Columbia subject headings:
Harvard subject headings:
Biographies
Diplomats--Portugal--Biography.
Palmela, Pedro de Sousa Holstein, Duque de, 1781-1850.
Portugal--Politics and government--1789-1900
Prime ministers--Portugal--Biography
Princeton subject headings:
Palmella, duque de, 1781-1850.
Portugal--Foreign relations--19th century.
Portugal--Politics and government--1834-1853.
Prime ministers--Portugal--Biography.