Columbia subject headings:
Catholic Church--Doctrines--Early works to 1800.
Mysticism--Catholic Church--Early works to 1800.
Harvard subject headings:
Mysticism--Early works to 1800
Mysticism--History--Middle Ages, 600-1500
Mysticism--Netherlands.
Spiritual life--Christianity--History of doctrines--Middle Ages, 600-1500
Spiritual life--Christianity--Middle Ages, 600-1500.
Princeton subject headings:
Catholic Church--Doctrines--Early works to 1800.
Mysticism--Catholic Church--Early works to 1800.