Composition #2: Ogunbodede, Olabode., McCombs, Douglas., Trout, Keeper., Daley, Paul., Terry, Martin. New mescaline concentrations from 14 taxa/cultivars of Echinopsis spp. (Cactaceae) ("San Pedro") and their relevance to shamanic practice. JOURNAL OF ETHNOPHARMACOLOGY, 2010, vol. 131, no. 2, p. 356-362. DOI: 10.1016/j.jep.2010.07.021.
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