Columbia subject headings:
Harvard subject headings:
Berlin (Germany)--Intellectual life--20th century
Harnack-Haus (Berlin, Germany)--History.
Learned institutions and societies--Germany--History--20th century.
Max-Planck-Gesellschaft zur Förderung der Wissenschaften--Societies, etc.--History--20th century.
Nobel Prize winners--History--20th century.
Science--Germany--Societies, etc.--History--20th century.
Princeton subject headings:
Berlin (Germany)--Intellectual life--20th century.
Harnack-Haus (Berlin, Germany)--History.
Learned institutions and societies--Germany--History--20th century.
Max-Planck-Gesellschaft zur Förderung der Wissenschaften--Societies, etc.--History--20th century.
Nobel Prize winners--History--20th century.
Science--Germany--Societies, etc.--History--20th century.