Source: SK-BRl (Bratislava) Rkp. 387 Missale NotatumFolio: 122vSequence: 3Full text: Priusquam montes fierent aut formaretur terra et orbis a saeculo et in saeculum tu es deusFeast: Dom. 21 p. Pent.Office: MASSGenre: GrVPosition: 01Cantus ID: g01242aImage link: http://147.213.131.4:85/digi/Rkp_zv_387/LKB___RKP_ZV_387_____24TL/SK/1_1_0122V.h…