http://www.artcyclopedia.com/artists/klee_paul.html
_ Paul Klee Art Documentary. Episode 13 Artists
https://youtu.be/ZxOHF6GzXyI
_ Paul Klee. Brief biography and artwork.
https://youtu.be/IJ7ZGdfta84
_ App Trailer: ExplorArt Klee - The Art of Paul Klee,
https://youtu.be/axiTM2Z92q4