Source: SK-BRl (Bratislava) Rkp. 387 Missale NotatumFolio: 183rSequence: 3Full text: Beatus servus*Feast: CallistiOffice: MASSGenre: CmCantus ID: g01354Image link: http://147.213.131.4:85/digi/Rkp_zv_387/LKB___RKP_ZV_387_____24TL/SK/1_1_0183R.h...