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1916 - 1919
                                    
            Letter to Karl Hagemann, 27 February 1937; as quoted in Kirchner and the Berlin street, ed. Deborah Wye, Moma, New York, 2008, p. 81 - note 31 
1930's
        
                                        
                                        Quote from Kirchner's Notebook entry 'Meine Strasenbilder', 24 Augustus 1919; as quoted in Ernst Ludwig Kirchner, Meisterwerke der Druckgraphik, M. M. Moeller, Gerd Hatje, Stuttgart 1990 p. 184 
1916 - 1919
                                    
                                        
                                        As quoted in Der Fuehrer: Hitler’s Rise to Power, Konrad Heiden, Boston, MA, Beacon Press, 1969, p. 147, first published 1944. Part of Hitler’s quote also cited in Totalitarianism: Part Three of The Origins of Totalitarianism, Hannah Arendt, A Harvest Book, 1985, footnote, p. 7 
1920s
                                    
Source: Fascism: What It Is and How to Fight It (1944), Ch. 1
                                        
                                        Page 5. 
New Age Politics: Healing Self and Society (1978)
                                    
Source: Der Fuehrer, Hitler’s Rise to Power (1944), p. 122
Amerika-Haus Berlin, George Rickey (1979). George Rickey: Skulpturen, Material, Technik. Nr. 1. p. 37
                                        
                                        Quote in Kandinsky's letter to Arnold Schönberg, 18 Jan. 1911; as cited in Schonberg and Kandinsky: An Historic Encounter, by Klaus Kropfinger; edited by Konrad Boehmer; published by Routledge (imprint of Taylor & Francis, an informal company), 2003, p. 9 
1910 - 1915
                                    
                                        
                                        Abstract Expressionist Painting in America, W.C, Seitz, Cambridge Massachusetts, 1983, p. 39: Statement concerning his painting 'Threading Light' 
1950's
                                    
 
                            
                        
                        
                         
                            
                        
                        
                         
                            
                        
                        
                         
                            
                        
                        
                         
                            
                        
                        
                         
                            
                        
                        
                        