| NL-Avu xv 05006 (cat.nr. 30) |
Antiphonarium pars aestivalis, 1516, of the Wilhelmietenklooster Baseldonck in 's Hertogenbosch. Prepared by Frater Georgius van Balen.
 | In Buscoducis, pp. 128, incl. facs. |
| | CMD-NL 2, nr. 324b, pl. 612-613 |
| | Gregoriaans in laatmiddeleeuws 's-Hertogenbosch, pp. 138-147, for a table of contents, pp. 126-133 for the Wilhelmus-office |