Columbia subject headings:
Europe, Northern--Historiography.
Historiography--Europe--History--To 1500.
Historiography--Scandinavia--History--To 1500.
Scandinavia--Historiography.
Harvard subject headings:
Civilization, Medieval.
Europe--Church history--600-1500.
Europe--History--476-1492--Historiography.
Middle Ages--Historiography
Vikings.
Princeton subject headings: