Columbia subject headings:
Harvard subject headings:
Socialism--Italy--Bergamo (Province)
Socialism--Italy--Bergamo (Province)--History.
Socialism--Italy--Brescia (Province)
Socialism--Italy--Brescia (Province)--History.
Princeton subject headings:
Socialism--Italy--Bergamo (Province)--History.
Socialism--Italy--Brescia (Province)--History.
Socialist parties--Italy--Bergamo (Province)--History.
Socialist parties--Italy--Brescia (Province)--History.