Columbia subject headings:
Bombacci, Nicola, 1879-1943.
Communism--Italy--History.
Communists--Italy--Biography.
Revolutionaries--Italy--Biography.
Harvard subject headings:
Bombacci, Nicola, 1879-1945
Italy--Politics and government--1870-1914.
Italy--Politics and government--1914-1922.
Socialists--Italy--Biography
Princeton subject headings:
Bombacci, Nicola, 1879-1945.
Communism--Italy--History.
Communists--Italy--Biography.
Revolutionaries--Italy--Biography.