Source: Praha, Národní knihovna ČR, ms. I E 12Siglum: CZ-Pu I E 12Folios: 43r-43vFolio: 043rSequence: 1Full text (or incipit): Si vis vera frui luceGenre: SqRubrics: De sancta + CruceFeast: De Sancta CruceCantus ID: ah50366Form: M
