Columbia subject headings:
Harvard subject headings:
Europe--Civilization--19th century--Periodicals--Congresses.
Europe--Civilization--20th century--Periodicals--Congresses.
Europe--Intellectual life--Congresses.
European periodicals--History--19th century--Congresses.
European periodicals--History--20th century--Congresses.
Princeton subject headings:
Europe--Civilization--19th century--Periodicals--Congresses.
Europe--Civilization--20th century--Periodicals--Congresses.
European periodicals--History--19th century--Congresses.
European periodicals--History--20th century--Congresses.