Columbia subject headings:
Harvard subject headings:
French language--Dialects--Channel Islands--Dictionaries.
French language--Dialects--France--Brittany--Dictionaries.
French language--Dialects--France--Normandy--Dictionaries.
French language--Foreign words and phrases--Scandinavian--Dictionaries.
Vikings--France--Brittany--History.
Vikings--France--Normandy--History.
Princeton subject headings:
French language--Foreign words and phrases--Scandinavian.