found: Crispell, M. Spirit music [SR] p1983:container (Billy Bang, violin)
found: Bang, B. Bang on! [SR] p1997:label (Billy Bang) insert (Billy Bang Walker) container (violin)
found: Guinness enc. of popular mus., 2nd ed.(Bang, Billy; b. Billy Walker, Sept. 20, 1947, Mobile, Ala.; violin)
found: All-media guide WWW page, Dec. 3, 1998(Billy Bang; real name: Walker, William Vincent; b. Sept. 20, 1947 in Mobile, AL; violin)
found: Wikipedia, Apr. 12, 2011(Billy Bang; b. William Vincent Walker, Sept. 20, 1947, Mobile, Ala., d. Apr. 11, 2011; American free jazz violinist and composer)