The Encyclopedia of Psychoactive Plants ,The encyclopedia of psychoactive plants : ethnopharmacology and its applications : Rätsch, Christian, 1957- : Free Download, Borrow, and Streaming : Internet Archive,The Encyclopedia of Psychoactive Plants: Ethnopharmacology and Its Applications: Christian Ratsch, Albert Hofmann (Foreward): 9780892819782: Amazon.com: Books,The Encyclopedia of Psychoactive Plants: Ethnopharmacology and Its Applications by Christian R?tsch (2005-04-25): unknown author: Amazon.com: Books,The Encyclopedia of Psychoactive Plants | Book by Christian Rätsch, Albert Hofmann | Official Publisher Page | Simon & Schuster