Columbia subject headings:
Agriculture--Economic aspects--Italy, Northern--History--To 1500.
Land tenure--Italy, Northern--History--To 1500.
Harvard subject headings:
Agriculture--Economic aspects--Italy--Lombardy--History.
Agriculture--Economic aspects--Italy--Piedmont--History.
Farms.
Land tenure--Italy--Lombardy--History.
Land tenure--Italy--Piedmont--History.
Princeton subject headings:
Agriculture--Economic aspects--Italy, Northern--History--To 1500.
Land tenure--Italy--Italy, Northern--History--To 1500.