I have not had the time to verify that these are good resources for your paper, although I believe most are. If you find a web site that you think is particularly helpful on any of these scientists, let me know, and I will replace the link here with the link you provide. Reference Librarian Spring 1996, rev. The questions proceed from simple factual data to complex evaluation of the scientist's contribution. The following list of selected sources reflects the above pattern of progression.
Biographical information given, the amount varies from several lines to several paragraphs.
The latter, often, include bibliographies of additional reading. American Men of Science. 6v American Men and Women of Science. 8v Asimov's Biographical Encyclopedia of Science. American Women in Science.