La Trobe University - Library: Medieval Music Database - Browse By Composer - Annual cycle of feasts of liturgical chant, liturgical polyphony and secular music of the late middle ages.

Medieval Music Database

Aosta, Biblioteca del Seminario Maggiore A1 D19 - not catalogued here.
Bologna, Civico Museo Bibliografico Musicale, Ms Q 15.
London, British Library, Additional 57950 (olim Old Hall, Library of St. Edmund's College)
Trent, Museo Provinciale d'Arte (ex Museo Nazionale, housed in Castello del Buon Consiglio), 87 - not catalogued here.