Jazz Musicians
Websites:

Jazz In America - Important Artists and Discography

Verve Music Group - Search page

PBS "Jazz" page - You may want to start with the "biography" link on the left side...

American National Biography Online - Type artist's last name in NAME search box.

Encyclopedia Britannica Online
Books:

016.78 RAT   Jazz : a critic's guide to the 100 most important recordings
781.64 MUR   Stomping the blues
781.65 JAZ    Jazz : the first century
781.65 OXF    The Oxford companion to jazz
781.65 SZW    Jazz 101 : a complete guide to learning and loving jazz
781.65 WAR  or  REF 781.65 WAR   Jazz : a history of America's music
92 COL    John Coltrane : a sound supreme
92 DAV  Miles Davis
92 ELL  The world of Duke Ellington
92 HOL   Lady sings the blues
920 GOU   Timekeepers : the great jazz drummers
920 JAS   Black bottom stomp : eight masters of ragtime and early jazz
920 SHI   Jazz makers : vanguards of sound
REF 784.5 PEN   The Penguin encyclopedia of popular music
REF 784.5 CAS   Cassell companion to 20th-century music
REF 920 HAR   The Harvard biographical dictionary of music
REF 920 ABR   Abriedged encyclopedia of world biography, Vol. 5, Arts and Entertainment
REF 920 WOR   World Musicians