Columbia subject headings:
Ragnar Loðbrók, active 9th century.
Ragnars saga loðbrókar ok sona hans.
Harvard subject headings:
Civilization, Viking.
Legends--Scandinavia--History and criticism.
Oral tradition--Scandinavia--History.
Ragnar Loðbrók, active 9th century.
Ragnar Loðbrók, active 9th century.
Vikings--Europe--Historiography.
Princeton subject headings:
Ragnar Loðbrók, active 9th century.
Ragnars saga loðbrókar ok sona hans.