1. Ohio State University, Spec.Rare.MS.MR.Frag.7 DS ID: DS11426 Title: Aurora Author: Petrus Riga Place: England Date: ca. 1210-1240
2. Rochester Institute of Technology, PORTFOLIO BOX 1-7 DS ID: DS16472 Title: Aurora Author: Petrus Riga Place: England Date: ca. 1210-1240