Columbia subject headings:
Middle class--Italy--Naples (Kingdom)
Naples (Kingdom)--Economic conditions--19th century.
Naples (Kingdom)--History--1735-1816.
Naples (Kingdom)--Social conditions--19th century.
Harvard subject headings:
Kingdom of the Two Sicilies--Economic conditions--19th century.
Kingdom of the Two Sicilies--History--1816-1861
Kingdom of the Two Sicilies--Social conditions--19th century.
Middle class--Italy--Kingdom of the Two Sicilies.
Naples (Kingdom)--History.
Naples (Kingdom)--Social conditions.
Princeton subject headings:
Middle class--Italy--Naples (Kingdom).
Naples (Kingdom)--Economic conditions--19th century.
Naples (Kingdom)--History--1735-1861.
Naples (Kingdom)--Social conditions--19th century.