Columbia subject headings:
Harvard subject headings:
Agriculture--Economic aspects--Italy--History--19th century--Congresses.
Industries--Italy--History--19th century--Congresses.
Italy--Economic conditions--1849-1870--Congresses.
Italy--Economic conditions--19th century--Congresses.
Princeton subject headings:
Agriculture--Economic aspects--Italy--History--19th century--Congresses.
Industries--Italy--History--19th century--Congresses.
Italy--Economic conditions--Congresses.