Columbia subject headings:
Berlin (Germany)--Civilization--20th century.
Berlin (Germany)--Intellectual life--20th century.
Vienna (Austria)--Civilization--20th century.
Vienna (Austria)--Intellectual life--20th century.
Harvard subject headings:
Berlin (Germany)--Civilization--20th century.
Berlin (Germany)--Intellectual life--20th century
Vienna (Austria)--Civilization--20th century.
Vienna (Austria)--Intellectual life--20th century.
Princeton subject headings:
Berlin (Germany)--Civilization--20th century.
Berlin (Germany)--Intellectual life--20th century.
Vienna (Austria)--Civilization--20th century.
Vienna (Austria)--Intellectual life--20th century.