Source: SK-Bra (Bratislava) Antiphonary of Bratislava III EC Lad.6Folio: 077rSequence: 3Full text: Aperiam in parabolis os meum loquar propositiones ab initio saeculiFeast: Fer. 2 Hebd. 4 Quad.Office: MGenre: VPosition: 01Cantus ID: 006138a