Columbia subject headings:
Art, European--20th century--Exhibitions.
Art, European--Exhibitions.
Harvard subject headings:
Art, Modern--20th century--Austria--Vienna--Exhibitions.
Art, Modern--20th century--Europe--Exhibitions.
Art, Modern--20th century--Germany--Munich--Exhibitions.
Art, Modern--20th century--Italy--Milan--Exhibitions.
Art, Modern--20th century--Switzerland--Zurich--Exhibitions.
Princeton subject headings: