Source: PL-WRu I F 413 Cistercian Gradual (Silesia)Folio: 068vSequence: 4Feast: Sabbato in AlbisOffice: MASSGenre: AllCantus ID: 008425.1Mode: 8Full text: Alleluia Haec dies quam fecit dominus exsultemus et laetemur in ea