Columbia subject headings:
Portugal--Economic conditions--20th century.
Portugal--Politics and government--1910-1926.
Representative government and representation--Portugal--History--20th century.
Harvard subject headings:
Portugal--Economic conditions--20th century.
Portugal--Politics and government--1910-1926.
Representative government and representation--Portugal--History--20th century.
Princeton subject headings:
Portugal--Economic conditions--20th century.
Portugal--Politics and government--1910-1926.
Representative government and representation--Portugal--History--20th century.