Columbia subject headings:
Harvard subject headings:
Artists--Germany--Düsseldorf--Biography.
Düsseldorf (Germany)--Social life and customs.
Klee, Paul, 1879-1940--Homes and haunts--Germany--Düsseldorf.
Princeton subject headings:
Artists--Germany--Düsseldorf.
Klee, Paul, 1879-1940--Criticism and interpretation.