Further Reading
Stu Borman, "Black Chemist Percy Julian Commemorated on Postage Stamp,"Chemical & Engineering News, 71 (5) (Feb. 1, 1993): 9-12.

Mary Ellen Bowden, "Percy Lavon Julian (1899 - 1975) and Carl Djerassi (1923)." In Chemical Achievers: The Human Face of the Chemical Sciences. (Chemical Heritage Foundation: Philadelphia, PA, 1997): 109-113.

W. Montague Cobb, "Percy Lavon Julian," Journal of the National Medical Association, 63 (2), (March 1971): 143.

Donald J. Cook, Chemistry At DePauw University, 1837 - 1987. (DePauw Association of Chemists: Greencastle, IN, 1987).

Paul DeKruif, "The Man Who Wouldn't Give Up." Reader's Digest Magazine, (August 1946): 113-118.P. L. Julian and J. Pikl, "Studies in the Indole Series. IV. The Synthesis of d,l- Eserethole." Journal of the American Chemical Society, 57 (March 1935): 563-566.

P. L. Julian and J. Pikl,"Studies of the Indole Series. V. The Complete Synthesis of Physostigmine (Eserine)." Journal of the American Chemical Society, 57 (April 1935): 755-757.

Bernard Witkop, "Percy Lavon Julian (1899 - 1975), A Biographical Memoir" in Biographical Memoirs, vol. 52,  (The National Academy Press: Washington, DC, 1980), 223.

Bernard Witkop, "From the 'Ordeal Bean' (Physostigas Venenosum) to the Ordeal of Alzheimer's Disease, Some of the Legacy of Percy Lavon Julian (1899 - 1975)," Heterocycles, 49 (1998): 9-27.