Richards, William A. | Purdue University Libraries, Archives and Special Collections
“Johns Hopkins Medicine Behavioral Pharmacology Research Unit.” William Richards Faculty Biography. September 15, 2011. http://www.bpru.org/bio/richards.html
Winkelman, Michael J. and Thomas B. Roberts (eds.). Psychedelic Medicine: New Evidence for Hallucinogenic Substances as Treatments. Westport, Conn.: Praeger Publishers, 2007.
Purdue Univeristy Archives and Special Collections Oral History Program