found: B.B. King live at the Regal. [Phonodisc] 1965.
found: B.B. King anthology, c1992:title page (B.B. King) page 77 (nickname B.B. short for Blues Boy)
found: AMG, Aug. 13, 2009(B.B. King; b. Riley B. King, Sept. 16, 1925, Indianola, Miss.)
found: Oxford music online, January 15, 2014:Grove music online (King, B. B. (Riley B.); born September 16, 1925, Itta Bena, MS; American blues singer and guitarist) Enc. of popular music, 4th ed. (King, B. B.; born Riley B. King, September 16, 1925, Indianola, Miss.)
found: B.B. King WWW site, January 15, 2014(B.B. King; Riley B. King; born September 16, 1925, on a plantation in Itta Bena, Mississippi, near Indianola)
found: New York times (online), viewed May 15, 2015(B.B. King; b. Riley B. King (the middle initial apparently did not stand for anything), Sept. 16, 1925, Berclair, Miss., a hamlet outside the small town of Itta Bena; d. Thursday [May 14, 2015], Las Vegas, aged 89; his world-weary voice and wailing guitar lifted him from the cotton fields of Mississippi to a global stage and the apex of American blues; B.B. stood for Blues Boy, a name he took with his first taste of fame in the 1940s)