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Self-Portrait as a Soldier
https://www.khanacademy.org/humanities/art-1010/early-abstraction/expressionism1/a/kirchner-self-portrait-as-a-soldier
http://www.oberlin.edu/amam/Kirchner_SelfPortrait.htm
http://www.cbsnews.com/news/the-tragedy-of-avant-garde-artist-ernst-kirchner/