Columbia subject headings:
Harvard subject headings:
Charities--Europe--History--18th century--Congresses.
Charities--Europe--History--19th century--Congresses.
Education--Europe--History--18th century--Congresses.
Education--Europe--History--19th century--Congresses.
Enlightenment--Europe--Congresses
Europe--Civilization--18th century--Congresses.
Europe--Civilization--19th century--Congresses.
Europe--Intellectual life--18th century--Congresses.
Europe--Intellectual life--19th century--Congresses.
Journalism--Europe--History--18th century--Congresses.
Journalism--Europe--History--19th century--Congresses.
Princeton subject headings:
Education--Europe--History--18th century--Congresses.
Enlightenment--Europe--Congresses.
Europe--Civilization--18th century--Congresses.
Popular education--Europe--History--18th century--Congresses.
Social networks--Europe--History--18th century--Congresses.