Columbia subject headings:
Harvard subject headings:
Ambrose, Saint, Bishop of Milan, -397--Criticism and interpretation.
Ambrose, Saint, Bishop of Milan, -397. Hymns.
Catholic Church--Hymns--History and criticism.
Hymns, Latin--Early works to 1800.
Princeton subject headings:
Ambrose, Saint, Bishop of Milan, -397.
Hymns, Early Christian--History and criticism.