Source: PL-WRu I F 413 Cistercian Gradual (Silesia)Folio: 040vSequence: 1Feast: Fer. 2 Hebd. 4 Quad.Office: MASSGenre: GrVCantus ID: g01168aMode: 5Full text: Deus in te speravi domine non confundar in aeternum