Source: Graduale in usum chori ordinis Praemonstratensis StrahoviensisSiglum: CZ-Pst DF I 1Folios: 267v-269rFolio: 267vSequence: 1Full text (or incipit): A rea uirgaGenre: SqRubrics: In gloriosa Assumptione beatae Mariae uirginisFeast: Assumptio MariaeFeast (text): Assumptio MariaeCantus ID: ah53106aForm: M