Columbia subject headings:
Carolingians.
France--Economic conditions.
France--History--To 987.
Millers--France--History.
Mills and mill-work--France--History.
Harvard subject headings:
Carolingians.
France--Economic conditions.
France--History--To 987.
Millers--France--History.
Mills and mill-work--France--History.
Princeton subject headings:
Carolingians.
France--Economic conditions.
France--History--To 987.
Millers--France--History.
Mills and mill-work--France--History.