Columbia subject headings:
Anarchists--Italy--Biography.
Communism.
Fabbri, Luigi, 1877-1935.
Fascism.
Harvard subject headings:
Anarchists--Italy--Biography
Communism.
Fabbri, Luigi, 1877-1935.
Fascism.
Princeton subject headings:
Anarchists--Italy--Biography.
Communism.
Fabbri, Luigi, 1877-1935.
Fascism.