Source: PL-Wn 12496 IV Graduale cistercienseFolio: 008vSequence: 4Feast: Dom. p. Nat. Dom.Office: MASSGenre: OffCantus ID: g00551Mode: *Full text: Deus enim firmavit*Notes: Dominica infra octavam Nativitatis DominiExternal image link: Image link