Columbia subject headings:
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Doctrines--Congresses.
Harvard subject headings:
Princeton subject headings:
Orthodox Eastern Church--Russia (Federation)--Congresses.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Congresses.
Theology.