Bland tomtar och troll (English: Among Gnomes and Trolls) is a popular Swedish folklore and fairy tales annual. Founded in 1907 and continuing to this very day, several of the foremost Swedish authors and illustrators have worked for the annual.
The first volumes had illustrations by John Bauer who was succeeded by Gustaf Tenggren. Between 1927 and 1980, Einar Norelius was the chief illustrator. Among the writers were authors such as Hjalmar Bergman, Helena Nyblom, Margareta Ekström, Gösta Knutsson and Edith Unnerstad.
Various is the correct author for any book with multiple unknown authors, and is acceptable for books with multiple known authors, especially if not all are known or the list is very long (over 50).
If an editor is known, however, Various is not necessary. List the name of the editor as the primary author (with role "editor"). Contributing authors' names follow it.
Note: WorldCat is an excellent resource for finding author information and contents of anthologies.
WHEEEEEEEEEE! I have a John Bauer illustrated edition. Go on, go green around the gills. Worry not though, I shall take digi photographs of every single Bauer illustration for your edification.
Jag samlar på "Bland Tomtar och Troll", de tidiga böckerna, med John Bauer och Gustav Tenggren (Tenggren flyttade så småningom till USA och blev tecknare hos Disney. Han var med och gjorde Snövit bl.a.)