1. Berlin in 1920 (Otto Friedrich, Before the Deluge: A Portrait of Berlin in 1920s, (New York: Harper and Row, 1972)
2. Berlin in 1945 (Anthony Read and David Fisher, The Fall of Berlin (Norton, 1992))
3. Berlin Today A (my own scan of a recent map)
4. Berlin Today B (my own scan of a recent map)
5. Berlin Hangouts Today (copy from an official tour site)
6. Stations of Nazi Persecution (an old Plötzensee official tour guide pamphlet)
7. Berlin and Cölln in 1400 (Anthony Read and David Fischer, Berlin Rising: Biography of a City (W. W. Norton, 1994).