Columbia subject headings:
Catholic Church--Italy--Messina--Liturgy--Texts--Manuscripts.
Church music--Italy--Messina.
Gregorian chants--Italy--Messina--Manuscripts.
Music, Byzantine--Manuscripts.
Sacred vocal music--Italy--Messina--Manuscripts.
Harvard subject headings:
Catholic Church--Italy--Messina--Liturgy--Texts--Manuscripts.
Church music--Catholic Church--Manuscripts.
Gregorian chants--Italy--Messina--Manuscripts.
Music, Byzantine--Manuscripts.
Sacred vocal music--Italy--Messina--Manuscripts.
Princeton subject headings:
Catholic Church--Italy--Messina--Liturgy--Texts--Manuscripts.
Church music--Italy--Messina.
Gregorian chants--Italy--Messina--Manuscripts.
Music, Byzantine--Manuscripts.
Sacred vocal music--Italy--Messina--Manuscripts.