Source: Graduale magnumSiglum: PL-WRu B 1714Folios: IrFolio: IrSequence: 16Full text (or incipit): O quam felix es*Genre: SqRubrics: SequenciaRubrics2: Concepcionis MarieFeast: Conceptio MariaeFeast (text): Conceptio MariaeCantus ID: ah34077Form: R