||Karel Philippus Bernet Kempers (1897-1974)
||Opera Omnia Vol.XII: Corpus Mensurabilis Musicae|
Rome: American Institute of Musicology, 1965. Plate CMM 412.
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Apparently in Cantiones ecclesiasticae : lib. 1-4, 1553, quator vocum, but IMSLP does not have this uploaded, so it has not been verified.