Columbia subject headings:
Harvard subject headings:
Anarchism--Italy--History--19th century.
Communism--Italy--History
Italy--Politics and government--1870-1914.
Sala Biellese (Italy)--History.
Socialism--Italy--History
Princeton subject headings:
Anarchism--Italy--Biella--History.
Communism--Italy--Biella--History.
Socialism--Italy--Biella--History.
Syndicalism--Italy--Biella--History.