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

Sancta Maria virgo intercede

anonymous antiphon

Oxford: Bodleian Library, Dep. Deeds, Christ Church C.34/D.R.3\%, fol. 1v (3/3).

SANDERS, Ernest H. 'Cantilena and Discant in 14th-century England', Musica Disciplina, XIX (1965), pp. 42-43.