Columbia subject headings:
France--Civilization--Congresses.
France--Relations--Poland--Congresses.
Poland--Civilization--Congresses.
Poland--Relations--France--Congresses.
Harvard subject headings:
France--Civilization--Congresses.
France--Relations--Poland--Congresses.
Poland--Civilization--Congresses.
Poland--Relations--France--Congresses.
Princeton subject headings:
France--Civilization--Congresses.
France--Relations--Poland--Congresses.
Poland--Civilization--Congresses.
Poland--Relations--France--Congresses.