Columbia subject headings:
Conferências do Casino (1871 : Lisbon, Portugal)
Portugal--Politics and government--1861-1889--Sources.
Socialism--Portugal--Congresses--History.
Socialism--Portugal--History.
Socialist International--History.
Harvard subject headings:
Conferências do Casino (1871 : Lisbon, Portugal)
Portugal--Politics and government--1861-1889--Sources.
Socialism--Portugal--Congresses--History.
Socialism--Portugal--History.
Socialism--Portugal.
Socialist International--History.
Princeton subject headings:
Conferências Democráticas do Casino Lisbonense (May-June 1871 : Lisbon, Portugal)
Socialism--Portugal--Congresses--History.
Socialism--Portugal--History.