Rogers, A. I'm a Jonah man, c1903 t.p. (Geo. Walker)
Woll, A. Dict. of the black theatre, c1983 p. 260 (George Walker, 1873-1911; with Bert (Egbert Austin) Williams, part of the musical comedy vaudeville team, Williams and Walker)
Smith, E.L. Bert Williams, c1992 p. 229-230 (George William Walker; partner of Bert Williams; b. ca. 1873 in Lawrence, KS; married Aida Overton Walker in 1899; early black recording artist for Victor Talking Machine Records in 1901; songwriter; d. Jan. 6, 1911 in Islip, N.Y. at age 38)
OCLC, Dec. 10, 1998 (hdg.: Walker, George, d. 1909)
Information from Kansas State Historical Society librarian, Dec. 1, 2008 (George William Walker; known locally as and cited in local media sources as: Nash Walker)
Wikipedia, viewed 27 September 2011 (Team of Bert Williams (November 12, 1874 - March 4, 1922 and George Walker (1873 - 1911) ; In September 1902, Williams & Walker debuted ...) http://en.wikipedia.org/wiki/Bert_Williams