Columbia subject headings:
Harvard subject headings:
Europe, Central--History--Congresses.
Home--Europe, Central--History--Congresses.
Identity (Psychology)--Europe, Central--Congresses.
Semiotics--Europe, Central--History--Congresses.
Princeton subject headings:
Europe, Central--History--Congresses.
Home--Europe, Central--History--Congresses.
Semiotics--Europe, Central--History--Congresses.