Columbia subject headings:
Burchard, Bishop of Worms, approximately 965-1025.
Burchard, Bishop of Worms, approximately 965-1025. Decretum.
Penance--Early works to 1800.
Penance--History--Middle Ages, 600-1500.
Penitentials.
Harvard subject headings:
Church discipline.
Penance--History--Middle Ages, 600-1500--Sources.
Penitentials.
Princeton subject headings:
Burchard, Bishop of Worms, approximately 965-1025.
Penance--Early works to 1800.
Penitentials--Early works to 1800.