In the original Cantus index for this manuscript, differentiae were assigned arbitrary numbers within each mode, with slight differences indicated by a lower-case suffix.
Downey, Charles. Inventory of Tours, Bibliothèque municipale, 149. In: Cantus: A Database for Latin Ecclesiastical Chant: Inventories of Chant Sources. Directed by Debra Lacoste (2011-), Terence Bailey (1997-2010), and Ruth Steiner (1987-1996). Web developer, Jan Kolácek (2011-).
Images: Tours, Bibliothèque municipale, 0149 Bibliothèque virtuelle des manuscrits médiévaux (BVMM)
Standardized manuscript tonary completed by Rebecca Shaw (Dalhousie University) on August 12, 2018. Edited by Jennifer Bain, Sister Ilaria Culshaw, Lucia Denk, Andrea Klassen, and Brayden Olson (Dalhousie University) on August 29, 2019.