Columbia subject headings:
Historiography--Europe, Central--History--Congresses.
Historiography--Political aspects--Europe, Central--Congresses.
Harvard subject headings:
Historiography--Europe, Central--History--Congresses.
Historiography--Political aspects--Europe, Central--Congresses.
Princeton subject headings:
Historiography--Europe, Central--History--Congresses.
Historiography--Political aspects--Europe, Central--Congresses.