Source: PL-WRu I F 414 Cistercian Gradual (Silesia)Folio: 007rSequence: 3Feast: Nativitas DominiOffice: MASSGenre: ComCantus ID: g00546Mode: 6TFull text: In splendoribus sanctorum ex utero ante luciferum genui teNotes: Missa in nocte