Columbia subject headings:
Catholic Church--Hymns.
Catholic Church--Liturgy.
Catholic Church--Prayers and devotions.
Hymns, Latin.
Religious poetry, Latin.
Sequences (Liturgy)
Harvard subject headings:
Catholic Church--Hymns.
Catholic Church--Liturgy.
Catholic Church--Prayers and devotions--Latin.
Hymns, Latin.
Religious poetry, Latin.
Sequences (Liturgy)
Princeton subject headings: