Columbia subject headings:
Delaunay, Robert, 1885-1941.
Klee, Paul, 1879-1940.
Time in art.
Harvard subject headings:
Delaunay, Robert, 1885-1941.
Klee, Paul, 1879-1940.
Time in art.
Princeton subject headings:
Delaunay, Robert, 1885-1941.
Klee, Paul, 1879-1940.
Painting, Modern--20th century.