Columbia subject headings:
Church music--Catholic Church.
Church music--Italy--Gubbio.
Ubaldo, Saint, approximately 1085-1160--Songs and music.
Harvard subject headings:
Church music--Catholic Church
Church music--Italy--Gubbio.
Ubaldo, Saint, approximately 1085-1160--Songs and music--History and criticism.
Ubaldo, Saint, approximately 1085-1160--Songs and music.
Princeton subject headings:
Church music--Catholic Church.
Church music--Italy--Gubbio.
Ubaldo, Saint, approximately 1085-1160--Songs and music.