1. Harley MS 3199, ff 56v-58r Reference (shelfmark): Harley MS 3199, ff 56v-58r Title: Guido of Arezzo, Praefatio in Antiphonarium Scope & Content: Guido of Arezzo, Praefatio in Antiphonarium Collection Area: Western Manuscripts Languages: Latin Date Range: 1st half of the 12th century Extent: 3 folios.
