Columbia subject headings:
Anarchists--Portugal--History.
Partido Republicano Português--History.
Partido Social-Democrata (Portugal)--History.
Political parties--Portugal--History.
Harvard subject headings:
Anarchism--Portugal--History.
Political parties--Portugal--History.
Portugal--Politics and government--1889-1908.
Republicanism--Portugal--History.
Socialism--Portugal--History.
Socialism--Portugal.
Princeton subject headings:
Anarchism--Portugal--History.
Political parties--Portugal--History.
Portugal--Politics and government--1889-1908.
Republicanism--Portugal--History.
Socialism--Portugal--History.