Britannica Online:Enrico Caruso - biography and discussion of his importance to the world of opera.
Caruso - provides photo and background information.
Caruso, Enrico - The Great Italian tenor. Detailed biography. Photographs.
Enrico Caruso Biography
Hutchinson:Caruso, Enrico - provides a brief biography of the tenor.
OperaWeb Singers: Enrico Caruso - includes anecdoctes and links.