Source: Praha, Knihovna Národního muzea, ms. XII A 1Siglum: CZ–Pn XII A 1Folios: 55v-56rFolio: 055vFull text (or incipit): Imperatrix angelorumGenre: SqRubrics: Alia prosaFeast: De BMVCantus ID: ah54226 Form: M
