Listing with MSN Entertainment includes birth and death, claims to fame, filmography, artists with whom he worked, and production teams of which he was a part.

Filmography showing his credits as actor, writer, composer, and arranger with links to his movies. From the Internet Movie Database.

List of operas, operettas, and comic operas, with additional information for selected works includes biographical sketch and critical evaluation of his importance. From U.S. Opera.

Biography with Gold Music comments on the relative conservatism of his 20th Century compositions.