Columbia subject headings:
Agriculture--Economic aspects--Italy--History--Congresses.
Agriculture--Italy--History--Congresses.
Farm management--Italy--History--Congresses.
Harvard subject headings:
Agriculture--Economic aspects--Italy--History--Congresses.
Agriculture--Italy--History--Congresses.
Farm management--Italy--History--Congresses.
Princeton subject headings:
Agriculture--Economic aspects--Italy--History--Congresses.
Farms--Italy--History--Congresses.
Land tenure--Italy--History--Congresses.