Columbia subject headings:
Harvard subject headings:
Berlin (Germany)--Antiquities--Congresses.
Berlin (Germany)--Civilization--Congresses.
Education, Humanistic--Germany--Berlin--History--Congresses.
Princeton subject headings:
Berlin (Germany)--Antiquities--Congresses.
Berlin (Germany)--Civilization--Congresses.
Education, Humanistic--Germany--Berlin--History--Congresses.