Columbia subject headings:
Art--Private collections--Switzerland--Basel--Exhibitions.
Beyeler, Ernst--Art collections--Exhibitions.
Klee, Paul, 1879-1940--Exhibitions.
Harvard subject headings:
Beyeler, Ernst--Art collections--Exhibitions.
Klee, Paul, 1879-1940--Exhibitions.
Painting--Private collections--Switzerland--Basel--Exhibitions.
Princeton subject headings:
Beyeler, Ernst--Art collections--Exhibitions.
Klee, Paul, 1879-1940--Exhibitions.