| GB-Eu 33 |
Graduale, 15th century, Augustinians of the Windesheim congregation.
The facsimile in David Hiley's book shows Ordinary chants with indications for alternatim practice (orgel and choor).
 | D. Hiley: Western Plainchant, p. 438-439 (incl. facs.) |
| | C.R. Borland: A descriptive catalogue of the western mediaeval manuscripts in Edinburgh University Library (Edinburgh 1916) |