Columbia subject headings:
Harvard subject headings:
Carbonia (Italy)--History--20th century.
Communism--Italy--History
Giganti, Umberto, 1919-1963.
Political prisoners--Italy--Carbonia--Biography.
Socialists--Italy--Carbonia--Biography.
Princeton subject headings:
Carbonia (Italy)--History--20th century.
Giganti, Umberto, 1919-1963.
Political prisoners--Italy--Carbonia--Biography.
Socialists--Italy--Carbonia--Biography.