Columbia subject headings:
Harvard subject headings:
Europe--Intellectual life--Congresses.
European letters--History and criticism--Congresses.
French letters--History and criticism--Congresses.
Friendship in literature--Congresses.
Friendship--Congresses.
Letter writing, French--History--Congresses.
Letter writing--History--Congresses.
Princeton subject headings:
European letters--History and criticism--Congresses.
French letters--History and criticism--Congresses.
Friendship in literature--Congresses.
Friendship--Congresses.
Letter writing, French--History--Congresses.
Letter writing--History--Congresses.