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 
