Columbia subject headings:
Europe, Eastern--History--Congresses.
Finno-Ugrians--Study and teaching--Congresses.
Finno-Ugric languages--Congresses.
Harvard subject headings:
Europe, Eastern--History--Congresses.
Finno-Ugric languages--Congresses.
Princeton subject headings:
Eighteenth century--Congresses.
Europe--Civilization--18th century--Congresses.
Europe--Languages--History--Congresses.