1. Harley MS 3199, ff 55v-56r Reference (shelfmark): Harley MS 3199, ff 55v-56r Title: Guido of Arezzo, De Constitutionibus in Musica Scope & Content: Guido of Arezzo, De Constitutionibus in Musica Collection Area: Western Manuscripts Languages: Latin Date Range: 1st half of the 12th century Extent: 2 folios.
