Faces in Science
| Distinguished Women Past and Present (http://www.distinguishedwomen.com/, 05-26-2004) |
| People and Discoveries (http://www.pbs.org/wgbh/aso/databank/, 05-26-2004) |
| The Faces of Science: African-Americans in the Sciences (http://www.princeton.edu/~mcbrown/display/faces.html, 05-27-2004) |
| Fact Monster: Notable Scientists (http://www.factmonster.com/spot/scibio2.html#geo, 03-21-2006) |
| Food Chains and Food Webs (http://www.vtaide.com/png/foodchains.htm, 01-26-2007) |