Columbia subject headings:
Harvard subject headings:
British Isles--Relations--Scandinavia.
Brittany (France)--Relations--Scandinavia.
Celts
Europe--Civilization--Scandinavian influences
Scandinavia--Relations--British isles.
Scandinavia--Relations--France--Brittany.
Vikings
Princeton subject headings:
British Isles--Relations--Scandinavia.
Brittany (France)--Relations--Scandinavia.
Celts.
Europe--Civilization--Scandinavian influences.
Scandinavia--Relations--British Isles.
Scandinavia--Relations--France--Brittany.
Vikings.