RT Article T1 Beyond the Initials: Melodic Evidence for the Liturgical Origin of a Regensburg Antiphonary JF Gottesdienst in Regensburger Institutionen SP 295 OP 306 A1 Smith, Innocent 1986- LA German YR 2021 UL https://ixtheo.de/Record/1917147708 SN 9783795436292