Columbia subject headings:
Italy--History--1849-1870.
Italy--History--1870-1914.
Italy--History--20th century.
Harvard subject headings:
Italy--History--1849-1870.
Italy--History--1870-1914.
Italy--History--20th century.
Princeton subject headings:
Italy--History--1849-1870.
Italy--History--1870-1914.
Italy--History--20th century.