Columbia subject headings:
Church music--Italy--Umbria--15th century.
Church music--Italy--Umbria--500-1400.
Music--Manuscripts--Catalogs.
Harvard subject headings:
Catholic Church--Italy--Umbria--Liturgy.
Catholic Church--Liturgy--History--Middle Ages, 600-1500.
Church music--Italy--Umbria--15th century.
Church music--Italy--Umbria--500-1400.
Music--Manuscripts--Italy--Catalogs.
Princeton subject headings:
Church music--Italy--Umbria--15th century.
Church music--Italy--Umbria--500-1400.
Music--Italy--Umbria--Manuscripts--Catalogs.