Columbia subject headings:
Catholic Church--Relations--Eastern churches--Congresses.
Church history--Primitive and early church, ca. 30-600--Congresses.
East and West--Religious aspects--Christianity--Congresses.
Eastern churches--Relations--Catholic Church--Congresses.
John Chrysostom, Saint, -407--Congresses.
Harvard subject headings:
Catholic Church--Relations--Eastern churches--Congresses.
Church history--Primitive and early church, ca. 30-600--Congresses.
East and West--Religious aspects--Christianity--Congresses.
Eastern churches--Relations--Catholic Church--Congresses.
John Chrysostom, Saint, -407--Congresses.
Princeton subject headings:
Catholic Church--Relations--Eastern Churches--Congresses.
East and West--Religious aspects--Christianity--Congresses.
John Chrysostom, Saint, -407--Congresses.