Detroit’s African American population has followed interesting migration patterns throughout the years. These are a series of maps that help demonstrate how people moved around the city as a result of changing racial attitudes, a growing black middle class, as well as shifting demographics from economic downturn. Paradise Valley can be easily seen in 1940 while it isn’t until later that we see other prominent black neighborhoods emerge to the West of Cass Corridor.
Still trying to track down a source, please leave a comment if you know.
Update 11/15/13
Thanks Matt Baker! These maps appear between pages 183 and 188.
Sugrue, T. J. (2005). The origins of the urban crisis: Race and inequality in postwar Detroit. Princeton University Press.
There are similar maps in Tom Sugrue’s ‘The Origins of the Urban Crisis’
http://www.amazon.com/The-Origins-Urban-Crisis-Inequality/dp/0691121869
Thanks Matt!
You can recreate this through social explorer.