Black Past
Black Past: Bert Williams
This encyclopedia article gives a good overview of the life of Bert Williams, a black entertainer of the early 1900's who broke many color lines.
Musicals 101
Musicals101: History of the Stage Musical 1910 1920
From Jerome Kern's Americanized shows to the Ziegfeld Follies, the stages saw a whole new type of musical from 1910-1920.
Encyclopedia Britannica
Encyclopedia Britannica: Bert Williams
Brief biography of Bert Williams, black comic actor of early 1900s.