Columbia subject headings:
Klee, Felix, 1907-1990--Art collections--Exhibitions.
Klee, Paul, 1879-1940--Exhibitions.
Harvard subject headings:
Klee, Felix, 1907---Exhibitions.
Klee, Felix, 1907-1990--Exhibitions.
Klee, Paul, 1879-1940--Exhibitions.
Painting, German--Exhibitions
Princeton subject headings:
Klee, Felix, 1907-1940--Exhibitions.
Klee, Paul, 1879-1940--Exhibitions.