Columbia subject headings:
Harvard subject headings:
Europe--History--Congresses
Germany--History--Congresses.
Policy networks--Congresses.
Social networks--Congresses.
Social sciences--Network analysis--Congresses.
Zettler, Alfons--Congresses.
Princeton subject headings:
Civilization, Medieval--Congresses.
Europe--History--Congresses.
Germany--History--Congresses.
Policy networks--Congresses.
Social networks--Germany--Breisgau--History--Congresses.
Social networks--History--To 1500--Congresses.
Social sciences--Network analysis--Congresses.
Zettler, Alfons--Congresses.