Columbia subject headings:
Harvard subject headings:
Communism--Italy--History--20th century
Communists--Italy--Biography
Partito comunista italiano--History--20th century.
Terracini, Umberto, 1895-
Princeton subject headings:
Communism--Italy--History--20th century.
Communists--Italy--Biography.
Partito comunista italiano--History--20th century.
Terracini, Umberto, 1895-1983.