Source: SK-BRsa Graduale Scepusiense Protoc. XVII Anni 1615-1616 27_SpGr_1615_1616_1r_alt.jpg 27_SpGr_1615_1616_1r_alt.jpg 27_SpGr_1615_1616_1v_alt.jpg 27_SpGr_1615_1616_1v_alt.jpg