Columbia subject headings:
France--History--To 987--Sources.
Germany--History--843-918--Sources.
Louis, King of the East Franks, 893-911.
Zwentibold, King of Lorraine, approximately 870-900.
Harvard subject headings:
Princeton subject headings:
France--History--To 987--Sources.
Germany--History--843-918--Sources.
Louis, King of the East Franks, 893-911.
Zwentibold, King of Bavaria, 870 or 71-900.