Columbia subject headings:
Civilization, Medieval--Congresses.
Europe--Rural conditions--Congresses.
Peasants--History--Congresses.
Harvard subject headings:
Civilization, Medieval--Congresses
Europe--Rural conditions--History--Congresses.
Peasants--History--Congresses.
Princeton subject headings:
Middle Ages--Congresses.
Peasants--Europe--Congresses.
Sociology, Rural--Congresses.