Baker's Biographical Dictionary of Musicians via GVRL
Baker's Biographical Dictionary of Popular Musicians since 1990 by
Broadway: Its History, People, and Places: An Encyclopedia by 
The Concise Oxford Companion to the Theatre by
The Great Jazz Pianists: Speaking of Their Lives and Music by
International Dictionary of Black Composers by
Major Film Directors of the American and British Cinema by
The New Grove Dictionary of Music and Musicians (Print) by 
The Oxford Companion to the American Musical by
Vaudeville, Old & New : an Encyclopedia of Variety Performers in America by 
