Cambridge, MA: Botanical Musuem of Harvard University, 1977. First edition - Contains two articles by Richard Schultes, who was one of the world's leading authorities on hallucinogenic and medicinal plants, a botanical explorer, a pioneering conservationist, and a teacher and mentor, as well as being credited as the modern founder of the science of ethnobotany who documented the use of over 2000 medicinal plants, mainly from the Colombian Amazon. The first article on Hevea is illustrated with 2 plates of botanical drawings and 2 maps. The second article by Schultes, Tony Swain and Timothy C. Plowman is on the changing usage of Virola as a hallucinogenic and is illustrated with 1 map and 5 plates of photographs. . pp 243-272.

New York: New York Academy of Sciences, 1976. First edition - A series of over 40 scholarly papers presented at a conference held on March 9, 10, and 11, 1976, sponsored by the New York Academy of Sciences and The National Institute on Drug Abuse. Topics include marihuana, hallucinogens, cocaine, methadone, amphetamines, antogonists, effects of combining drugs, etc. Illustrated with charts and diagrams. References following each paper. 489 pp. ISBN: 0-890720274.