Columbia subject headings:
Harvard subject headings:
Children's literature, German--History and criticism
Children's literature, Scandinavian--History and criticism.
Fairy tales--Germany
Fairy tales--Scandinavia.
Folklore--Germany
Folklore--Scandinavia
Old Norse literature--History and criticism.
Sagas--Themes, motives.
Scandinavian literature--History and criticism.
Trolls--Germany.
Trolls--Scandinavia.
Princeton subject headings:
Trolls--History.