Source: PL-WRu I F 411 Cistercian Gradual (Silesia)Folio: 004rSequence: 1Feast: Fer. 4 Q.T. AdventusOffice: MASSGenre: IntrCantus ID: 501007Mode: 1Full text: Rorate caeli desuper et nubes pluant justum aperiatur terra et germinet salvatorem