Columbia subject headings:
Harvard subject headings:
Italy--Boundaries--History--19th century.
Italy--Boundaries--History--20th century.
Italy--Foreign relations--1849-1870.
Italy--Foreign relations--1870-1914.
Italy--Foreign relations--20th century.
Princeton subject headings:
Italy--Boundaries--History--19th century.
Italy--Boundaries--History--20th century.
Italy--Foreign relations--1849-1870.
Italy--Foreign relations--1870-1914.
Italy--Foreign relations--20th century.