Source: PL-Wn 12496 IV Graduale cistercienseFolio: 060rSequence: 10Feast: Cathedra PetriOffice: MASSGenre: InVCantus ID: g01271cMode: *Full text: Memento*Notes: later addition; In Cathedra s. Petri RomaeMarginalia: RExternal image link: Image link