Columbia subject headings:
Harvard subject headings:
Feudalism--Germany--Congresses.
Feudalism--Italy--Congresses.
Germany--Rural conditions--Congresses.
Italy--Rural conditions--Congresses.
Nobility--Germany--Congresses.
Nobility--Italy--Congresses.
Princeton subject headings:
Germany--Rural conditions--Congresses.
Italy--Rural conditions--Congresses.
Landowners--Germany--History--Congresses.
Landowners--Italy--History--Congresses.
Nobility--Germany--History--Congresses.
Nobility--Italy--History--Congresses.