Columbia subject headings:
Catholic Church--Hymns.
Gregorian chants.
Hymns, Latin.
Sequences (Music)
Harvard subject headings:
Catholic Church--Hymns.
Gregorian chants
Hymns
Hymns, Latin
Sequences (Music)
Princeton subject headings:
Catholic Church--Hymns.
Gregorian chants.
Hymns, Latin.
Hymns.
Sequences (Music)