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The Encyclopedia of Psychoactive Plants: Ethnopharmacology and Its Applications: Christian Ratsch, Albert Hofmann (Foreward): 9780892819782: Amazon.com: Books
Blue Meanies Mushrooms: A Guide To Panaeolus cyanescens | DoubleBlind Mag
Mystery of why magic mushrooms go blue solved | Research | Chemistry World
Self-reported negative outcomes of psilocybin users: A quantitative textual analysis | PLOS ONE