Columbia subject headings:
Harvard subject headings:
Conversion--Christianity--History.
German poetry--Middle High German, 1050-1500--History and criticism
Germanic peoples--Religion.
Heldensage--History and criticism.
Middle Ages--Historiography
Old Norse poetry--History and criticism.
Scandinavia--History--To 1500--Historiography.
Syncretism (Religion)--Scandinavia--History.
Princeton subject headings:
Heldensage--History and criticism.
Middle Ages--Historiography.
Scandinavia--Church history--To 1500.