Columbia subject headings:
Normandy (France)--History.
Vikings--France--Normandy.
Harvard subject headings:
Carolingians--History.
France--History--To 987.
Franks--History
Normandy (France)--History--To 1515.
Normandy (France)--History.
Normans--Historiography.
Normans--History.
Vikings--France--History.
Vikings--France.
Princeton subject headings:
Carolingians--History.
Normandy (France)--History.
Vikings--France--History.