Source: PL-WRu I F 416 Cistercian Gradual (Silesia)Folio: 147rSequence: 4Feast: Joannis BaptistaeOffice: MASSGenre: ComCantus ID: g00243Mode: 2TFull text: Tu puer propheta altissimi vocaberis praeibis enim ante faciem domini parare vias ejus