Columbia subject headings:
Harvard subject headings:
Friuli Venezia Giulia (Italy)--Social conditions--19th century.
Friuli Venezia Giulia (Italy)--Social conditions--20th century.
Labor unions--Italy--Friuli-Venezia Giulia--History--19th century.
Labor unions--Italy--Friuli-Venezia Giulia--History--20th century.
Partito socialista italiano.
Socialism--Italy--Friuli-Venezia Giulia--19th century.
Socialism--Italy--Friuli-Venezia Giulia--20th century.
Socialism--Italy--Friuli-Venezia Giulia--History--19th century.
Socialism--Italy--Friuli-Venezia Giulia--History--20th century.
Princeton subject headings:
Socialism--Italy--Friuli--History--Sources.
Socialism--Italy--Pordenone (Province)--History.
Socialism--Italy--Pordenone--History.