Columbia subject headings:
France--Economic conditions--987-1515.
France--Social conditions--987-1515.
Harvard subject headings:
Civilization, Medieval
France--Civilization.
France--Rural conditions.
France--Social conditions--987-1515.
France--Social conditions--To 987.
Picardy (France)--History.
Villages--France--History.
Princeton subject headings:
France--Economic conditions--987-1515.
France--Social conditions--987-1515.