E-MUc B-1/1 (No. 4)
Según RISM: "The musical incipit 1.1.1, written in black Gregorian notation (brevis and semibrevis figures).
The are 2 exemplars for the Soprano. bc = "Continuo". The composer looks to be the arranger of a previous mass, may be by himself or by another composer (?): "Reformada por D. Ydalecio Soriano"".