http://en.wikipedia.org/wiki/1920s tought me alot about the 1920's
http://www.kyrene.k12.az.us/schools/brisas/sunda/decade/1920.htm tought me about how the inventing of the radio affected blues and jazz
http://www.yelp.com/search?find_loc=Philadelphia%2C+PA%2C+USA&cflt=jazzandblues showed me some possible places for me to interview people that may know how jazz and blues ties into philadelphia