Columbia subject headings:
Berggruen, Heinz--Art collections--Exhibitions.
Klee, Paul, 1879-1940--Exhibitions.
Metropolitan Museum of Art (New York, N.Y.)--Exhibitions.
Harvard subject headings:
Princeton subject headings:
Art--Private collections--Germany--Berlin--Exhibitions.
Berggruen, Heinz--Art collections--Exhibitions.
Klee, Paul, 1879-1940--Exhibitions.
Metropolitan Museum of Art (New York, N.Y.)--Exhibitions.