Columbia subject headings:
Agricultural laborers--Italy--History--Congresses.
Italy--Rural conditions--Congresses.
Harvard subject headings:
Agricultural laborers--Italy--History--Congresses.
Italy--Rural conditions--Congresses.
Princeton subject headings:
Agricultural laborers--Italy--History--Congresses.
Agriculture--Economic aspects--Italy--History--Congresses.
Italy--Rural conditions--Congresses.
Serfdom--Italy--History--Congresses.
Social history--Medieval, 500-1500--Congresses.
Wages--Agricultural processing industry workers--Italy--History--Congresses.