Columbia subject headings:
Harvard subject headings:
Agriculture--Economic aspects--Italy--Lombardy--History.
Aristocracy (Social class)--Italy--Lombardy--History.
Economic history--Medieval, 500-1500
Feudalism--Italy--Lombardy.
Lombardy (Italy)--Economic conditions.
Lombardy (Italy)--History--To 1535.
Lombardy (Italy)--Rural conditions.
Princeton subject headings:
Lombardy (Italy)--Economic conditions.
Lombardy (Italy)--History--To 1535.
Lombardy (Italy)--Rural conditions.