Columbia subject headings:
Christian ethics--History--Middle Ages, 600-1500.
Radulphus, Ardens, active 12th century. Speculum universale.
Virtue--History of doctrines--Middle Ages, 600-1500.
Harvard subject headings:
Christian ethics--History--Middle Ages, 600-1500
Radulphus, Ardens, active 12th century. Speculum universale
Virtue--History of doctrines--Middle Ages, 600-1500.
Princeton subject headings: