CSM 7 Ugolinus Urbevetanis (Ugolino of Orvieto) (Ca. 1380-Ca. 1457), Declaratio Musicae Disciplinae, Edited by Albert Seay in 3 Volumes. Vol. I Liber (Hardcover)
CSM 7 Ugolinus Urbevetanis (Ugolino of Orvieto) (Ca. 1380-Ca. 1457), Declaratio Musicae Disciplinae, Edited by Albert Seay in 3 Volumes. Vol. III Libe (Hardcover)
CSM 7 Ugolinus Urbevetanis (Ugolino of Orvieto) (Ca. 1380-Ca. 1457), Declaratio Musicae Disciplinae, Edited by Albert Seay in 3 Volumes. Vol. II Liber (Hardcover)