Source: PL-Klk 1 Antyfonarz kieleckiFolio: 004rSequence: 3Feast: Fer. 4 Hebd. 4 Adv.Office: LGenre: APosition: 1Cantus ID: 004392Mode: 2Differentia: D1Full text: Prophetae praedicaverunt nasci salvatorem de virgine Maria