4B: War and Revolution
- Long (with Rigby), “The War Experience,” 161 – 172.
- Long (with Ida Katherine Rigby), “Critics, Artists, and the Revolution,” 173 – 190.
- Long (with Rigby), “Novembergruppe,” 210 – 221.
- Peter Paret, "The Great Dying: Notes on German Art 1914-18," German Encounters with Modernism, 1840-1945 (Cambridge, UK & New York: Cambridge University Press, 2001), 133 -143.
- Ida Katherine Rigby, "German Expressionist Political Posters 1918-19: Art and Politics, a Failed Alliance," Art Journal, 44.1, "The Poster" (Spring 1984): 33 - 39.