Columbia subject headings:
Catholic Church. Poenitentiaria Apostolica--History--Congresses.
Ecclesiastical courts--History--Congresses.
Penance--History--Congresses.
Harvard subject headings:
Catholic Church. Poenitentiaria Apostolica--History--Congresses.
Ecclesiastical courts--History--Congresses.
Penance--History--Congresses.
Princeton subject headings: