DownBeat.com: Hoagy Carmichael: Biography, photo, and discography.
Fresh Air: American Popular Song Series - Hoagy Carmichael: Profile and audio of a tribute to the composer, including performances of his works and interviews with his son, Hoagy Bix Carmichael, and biographer Richard Sudhalter.
Hoagy Carmichael Collection: Searchable collection of lyrics, sound files (RealPlayer), photographs, corresponsdence and supplemental research material about this songwriter who lived 1899-1981.
Jerry Jazz Musician: Richard Sudhalter: Interview with biographer Richard Sudhalter about Carmichael's life and music, with audio samples.
MSN Learning & Research: Carmichael, Hoagy: Short encyclopedia article.
Red Hot Jazz: Hoagy Carmichael: Biography, discography, and filmography.