Columbia subject headings:
Harvard subject headings:
Industries--Italy--History--19th century.
Italy--Economic conditions--19th century.
Italy--Politics and government--1815-1870.
Weapons industry--Italy--History--19th century.
Princeton subject headings:
Industries--Italy--History--19th century.
Italy--Economic conditions--19th century.
Italy--Politics and government--1815-1870.
Weapons industry--Italy--History--19th century.