http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Steenstrup, Johannes C. H. R. (Johannes Christoffer Hagemann Reinhardt)
translated from the Danish of Johannes C. H. R. Steenstrup, by Edward Godfrey Cox.
"Scandanavian ballad collections cited in the text": page 266.