PBS
Pbs: Jazz: Glenn Miller
This site offers a short biography of the great musical composer Glenn Miller. Includes information on his backgrounds, as well as his musical achievements.
Other
Glenn Miller: A Short Biography
This short, but detailed, biography gives a good summary of Glenn Miller's musical life.
Scott Alexander
Red Hot Jazz: Dorsey Brothers Orchestra
Brief history of the Dorsey Brothers' musical careers including a good sized discography collection.
Other
Amg All Music Guide: The Dorsey Brothers
This resource offers a brief synopsis of the careers of brothers Jimmy and Tommy Dorsey, and their successes and failures in the music business.