Columbia subject headings:
Education--Russia--Philosophy--Congresses.
Enlightenment--Russia--History--Congresses.
Russia--Intellectual life--Congresses.
Harvard subject headings:
Education--Russia--Philosophy--Congresses.
Enlightenment--Russia--Congresses.
Enlightenment--Russia--History--Congresses.
Russia--Intellectual life--18th century--Congresses.
Russia--Intellectual life--Congresses.
Princeton subject headings:
Russia--Intellectual life--Congresses.