Columbia subject headings:
Harvard subject headings:
Italy--Politics and government--1870-1914.
Italy--Politics and government--1914-1922.
Liberalism--Italy--History--19th century.
Liberalism--Italy--History--20th century
Sonnino, Sidney, 1847-1922.
Princeton subject headings:
Italy--Social conditions--1870-1918.
Sonnino, Sidney, 1847-1922--Political and social views.