Columbia subject headings:
Land tenure--Italy--History--Middle Ages, 600-1500.
Serfdom--Italy--History--Middle Ages, 600-1500.
Slavery--Italy--History--Middle Ages, 600-1500.
Harvard subject headings:
Land tenure--Italy--History--Middle Ages, 600-1500.
Serfdom--Italy--History--Middle Ages, 600-1500.
Slavery--Italy--History--Middle Ages, 600-1500.
Princeton subject headings:
Peasants--Italy--Piemonte--History.
Serfdom--Italy--Piemonte--History.