Liber Ordinarius Sancte Marie Traiectensis

Liber Ordinarius Sancte Marie Traiectensis. The Ordinal of St Mary's Church, Utrecht (Ms. London, British Library, Add. 9769), edited by Kees Vellekoop, with a codicological description by Gisela Gerritsen-Geywitz and an index of incipits by Bouke Jan van der Veen.
Bouwstenen voor een geschiedenis der toonkunst in de Nederlanden 6 (Amsterdam 1996).

This contains an edition, with a description and indices, of ms GB-Lbl Add. 9769, the Ordinal of the Mariakerk Utrecht.