1. The Sacred Mushroom and the Cross, Garden City;Allegro,1970
2. Gordon: “Soma of the Aryans: an ancient hallucinogen-”;Wasson;Bulletin on Narcotics,1970
3. “The Plant Kingdom and Hallucinogens”;cf. Schulte;Bulletin on Narcotics,1969
4. “The Mechanism of Action of Hallucinogenic Drugs on a Possible Serotonin Receptor in the Brain”;Smythies;International Review of Neurobiology,1970
5. “The History of Tension”;Huxley;Annals of the New York Academy of Sciences,1957