Columbia subject headings:
Harvard subject headings:
Education--Congresses
Religion and culture--Congresses
Religion--Congresses
Princeton subject headings:
Europe, Northern--Religion--Congresses.
Missions--Russia (Federation)--History--Congresses.
Periodicals.
Religion--Congresses.
Religion--Periodicals.
Russia (Federation)--Church history--Congresses.
Russia (Federation)--Religion--Congresses.