Columbia subject headings:
Catholic Church--Hymns--History and criticism.
Catholic Church. Hymnary.
Hymns, Latin--Bibliography.
Harvard subject headings:
Catholic Church--Hymns--History and criticism
Catholic Church--Liturgy--Hymnary.
Hymns, Latin--Bibliography
Princeton subject headings:
Catholic Church Hymnary.
Catholic Church--Hymns--History and criticism.
Hymns, Latin--Bibliography.