Liber ordinarius Sancte Marie traiectensis : (Ms. London British Library, Add. 9769) = The ordinal of St. Mary's Church, Utrecht
· edited by Kees Vellekopp ; with a codicological description by Gisela Gerritsen-Geywitz and an index of incipits by Bouke Jan van der Veen
Bok Engelsk 1996
Flere språk: Latin