Columbia subject headings:
Harvard subject headings:
Catholic Church--Hymns--History and criticism.
Catholic Church--Hymns.
Cistercians.
Hymns, Latin--History and criticism.
Hymns, Latin--Translations into German.
Poetry, Medieval--History and criticism.
Princeton subject headings:
Catholic Church--Hymns--History and criticism.
Catholic Church--Hymns.
Cistercians.
Hymns, Latin--History and criticism.
Hymns, Latin--Translations into German.
Hymns.
Poetry, Medieval--History and criticism.