Columbia subject headings:
Milan (Italy)--Politics and government--1859-1945.
Radicalism--Italy--Milan--History.
Socialism--Italy--Milan--History.
Working class--Italy--Milan--History.
Harvard subject headings:
Milan (Italy)--Politics and government--1859-1945.
Radicalism--Italy--Milan--History.
Socialism--Italy--Milan--History.
Socialism--Italy--Milan.
Working class--Italy--Milan--History.
Princeton subject headings:
Milan (Italy)--Politics and government--1859-1945.
Radicalism--Italy--Milan--History.
Socialism--Italy--Milan--History.
Working class--Italy--Milan--History.