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

Credo

anonymous

Yoxford: [manuscript in private possession, on deposit in Keble College Library, Oxford], number 6.

FELDMANN, Fritz. Musik und Musikpflege im mittelalterlichen Schlesien, Breslau: 1938.