So here's the story: for my jazz histrory class, I'm wanting to do my final paper on the evolution of jazz bass; mostly how the switch from tuba/sousaphone to double bass occured and the evolution of the standard walking bassline, rather than constant two-beat lines. If possible, information on musicians (obviously players like Pops Foster, Welman Braud, etc...) and also any regional information. Basically just all the information I can possibly dig up on this subject. I'm hoping maybe someone around here either has some good info or knows of good websites/articles/books/recordings that I could use. Thanks for any help!