Source: SK-BRl (Bratislava) Rkp. 387 Missale NotatumFolio: 173rSequence: 3Full text: Propter veritatem*Feast: Nativitas MariaeOffice: MASSGenre: GrCantus ID: g00412Image link: http://147.213.131.4:85/digi/Rkp_zv_387/LKB___RKP_ZV_387_____24TL/SK/1_1_0173R.h…