Notable Scientists: From 1900 to the Present Gale Group, 2001 Reproduced in Biography Resource Center.

Reproduced in Biography Resource Center, Gale, 2008.

American Decades Gale Research, 1998; Reproduced in Biography Resource Center.

"Richard Pryor" in Shirelle Phillips (editor) Contemporary Black Biography, Volume 24 Reproduced in Biography Resource Center.

Dictionary of American Biography Base Set, Theodosia Burr, American Council of Learned Societies, 1928-1936, Reproduced in Biography Resource Center.

Reproduced in Biography Resource Center.