African Americans in science, math, and invention by You can also find biographies of particular mathematicians by doing keyword searches on their names in SOUTHcat, the University Libraries' catalog at http://southcat2.usouthal.edu/vwebv/searchBasic
Biographical Dictionary of Mathematicians
Notable Women in Mathematics by 
Leading personalities in statistical sciences by Searching Google or another search engine using a particular mathematician's name, for example: Hypatia, Euler or Ramanujan, will help you find web sites with biographical information specific to that person. Here are some general biographical web sites for mathematicians.
