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

[untexted work: US-SM 19914 n2]

anonymous liturgical work

San Marino: California, Huntington Library, HM 19914, fol. 1 (2/0).

LEFFERTS, Peter M. The Motet in England in the Fourteenth Century, Ann Arbor: UMI Research Press, 1986, p. 308.