Columbia subject headings:
Internationalism--History.
Internationalists--Italy--Biography.
Pacifism--History.
Pacifists--Italy--Biography.
Socialism--History.
Socialism--Italy--History.
Socialists--Italy--Biography.
Treves, Claudio, 1869-1933.
Harvard subject headings:
Internationalism--History.
Internationalists--Italy--Biography.
Pacifism--History
Pacifists--Italy--Biography.
Socialism--History
Socialism--Italy
Socialism--Italy--History
Socialists--Italy--Biography
Treves, Claudio, 1869-1933.
Princeton subject headings:
Internationalism--History.
Internationalists--Italy--Biography.
Pacifism--History.
Pacifists--Italy--Biography.
Socialism--History.
Socialism--Italy--History.
Socialists--Italy--Biography.
Treves, Claudio, 1869-1933.