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Hucbald, of Saint Amand, d'Arezzo Guido, Joannes Cotton, Warren Babb, and Claude V. Palisca. Hucbald, Guido, and John on Music: Three Medieval Treatises. New Haven: Yale University Press, 1978.

Hucbald, of Saint Amand, et al. Hucbald, Guido, and John on Music: Three Medieval Treatises. Yale University Press, 1978.