Columbia subject headings:
Harvard subject headings:
Penance--History of doctrines--Early church, ca. 30-600--Sources.
Penance--History of doctrines--Early church, ca. 30-600.
Penance--Papal documents.
Penitents.
Princeton subject headings:
Penance--History of doctrines--Early church, ca. 30-600--Sources.
Penance--Papal documents.