Columbia subject headings:
Harvard subject headings:
Kaiser Wilhelm-Gesellschaft zur Förderung der Wissenschaften--History--Congresses.
Learned institutions and societies--Germany--History--Congresses.
Max-Planck-Gesellschaft zur Förderung der Wissenschaften--History--Congresses.
Research institutes--Germany--History--Congresses.
Science--Germany--Societies, etc.--History--Congresses.
Princeton subject headings:
Kaiser Wilhelm-Gesellschaft zur Förderung der Wissenschaften--History--Congresses.
Learned institutions and societies--Germany--History--Congresses.
Max-Planck-Gesellschaft zur Förderung der Wissenschaften--History--Congresses.
Research institutes--Germany--History--Congresses.
Science--Germany--Societies, etc.--History--Congresses.