an Entity references as follows:
The Codex Wormianus or AM 242 fol. is an Icelandic vellum codex dating from the mid-14th century. It contains an edition of the Prose Edda and some additional material on poetics, including the First Grammatical Treatise. It is the only manuscript to preserve the Rígsþula. The scribe who wrote Codex Wormianus worked on a number of manuscripts, including the Stjórn codex AM 227 fol.