Bert Williams, son of laughter, 1923 (subj.) t.p. (Bert Williams) [info from CU]
Southern, E. Bio. dict. of Afro-Amer. and African musicians (Williams, Egbert Austin ("Bert"); b. Nov. 12, 1874, Antigua, West Indies, d. Mar. 5, 1922, New York, N.Y.; entertainer)
New Grove dict. of Amer. mus. (Williams, Bert (Egbert Austin); b. Nov. 12, 1874, ?Antigua, d. Mar. 4, 1922, New York; comedian, actor, and singer)
Perf. arts biog. master index (Williams, Bert; d. 1922 [4 citations]; 1874-1922 [5]; 1875-1922 [1]; 1876-1922 [2]; 1877-1922 [1]; 1878-1922 [1])
Introducing Bert Williams, c2008 ECIP t.p. (Bert Williams) copr. p. (Bert A. Williams (1874-1922))
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