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