Columbia subject headings:
Harvard subject headings:
Ferrero, Guglielmo, 1871-1942
Legitimacy of governments--Italy.
Political science--Italy--History--20th century
Princeton subject headings:
Ferrero, Guglielmo, 1871-1942--Congresses.
Historiography--Italy--Congresses.
Political science--Italy--History--20th century--Congresses.