Columbia subject headings:
Mysticism--History--Middle Ages, 600-1500.
Spiritual life--Christianity--History of doctrines--Middle Ages, 600-1500.
Harvard subject headings:
Mysticism--History--Middle Ages, 600-1500
Spiritual life--Christianity--History of doctrines--Middle Ages, 600-1500
Princeton subject headings:
Mysticism--History--Middle Ages, 600-1500.
Spiritual life--Christianity--History of doctrines--Middle Ages, 600-1500.