Columbia subject headings:
Harvard subject headings:
Government and the press--Portugal--History--19th century.
Portugal--Politics and government--1816-1826.
Portugal--Politics and government--1826-1853.
Press and politics--Portugal--History--19th century.
Princeton subject headings:
Journalism--Political aspects--Portugal--History--19th century.
Portugal--Politics and government--1826-1853.
Portuguese newspapers--History--19th century.
Press and politics--Portugal--History--19th century.