Source: PL-PŁsem MsEPl 12 Antyfonarz z Płocka, pars de sanctisFolio: 029rSequence: 2Feast: AgathaeOffice: MGenre: VPosition: 01Cantus ID: 006625aMode: *Rubrics: in supplemento post octavum responsoriumFull text: Gratias tibi ago*Notes: add. posteriori manuMarginalia: R