Columbia subject headings:
Zerbolt, Gerard, 1367-1398.
Harvard subject headings:
Spiritual life--Christianity--History of doctrines--Middle Ages, 600-1500
Zerbolt, Gerard, 1367-1398
Princeton subject headings:
Devotio moderna.
Spirituality--History of doctrines--Middle Ages, 600-1500.
Zerbolt, Gerard, 1367-1398.