Columbia subject headings:
Catholic Church--Oriental rites--Congresses.
Catholic Church. Congregatio pro Ecclesia Orientali--History--Congresses.
Pontificium Institutum Orientalium Studiorum--History--Congresses.
Harvard subject headings:
Catholic Church. Congregation for the Eastern Churches--Congresses.
Mission of the church--Congresses
Pontificium Institutum Orientalium Studiorum--Congresses.
Princeton subject headings:
Mission of the church--Congresses.