Columbia subject headings:
Harvard subject headings:
Local history--Research--Germany--Bonn--Congresses.
Rhineland (Germany)--History--Study and teaching--Germany--Bonn--Congresses.
Universität Bonn. Institut für Geschichtliche Landeskunde der Rheinlande--History--Congresses.
Princeton subject headings:
Historiography--Germany--Bonn--Congresses.
History--Study and teaching (Higher)--Germany--Bonn--Congresses.
Rhineland (Germany)--History--Congresses.
Universität Bonn. Institut für Geschichtliche Landeskunde der Rheinlande--Congresses.
Universities and colleges--Germany--Bonn--Congresses.