I did a paper on this a while back. Here's a few of my sources.

Dan Sicko: Techno Rebels: The Renegades of Electronic Funk, Billboard Books

This was a pretty good one as Sicko is a Detroit native and was a scenester from the early days and was politically aware also. He gives social commentary in politics, racial issues and socio-economic issues especially the bond that alot of the impoverished black guys from Detroit ghettos and the poor guys from Berlin slums andsome of the social parallels they had.

http://en.wikipedia.org/wiki/Detroit..._Music_Archive
These guys are exactly what you are looking for. The motherload of documentable info on anything to do with detroit electronic music.

http://www.undergroundresistance.com/
I wrote these guys and they bent over backwards to help me out too.

Hope this helps.