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by Schultes, Richard Evans; von Reis, Siri
by Ruiz, Hipolito; Schultes, Richard Evans; de Jaramillo-Arango, Maria Jose Nemry von Thenen; et al.
by Schultes, Richard Evans; Hofmann, Albert; Rätsch, Christian
by Schultes, Richard Evans; Hofmann, Albert; Ratsch, Christian
by Schultes, Richard Evans
by Schultes, Richard Evans; Raffauf, Robert F.
by Schultes, Richard Evans y Albert Hofmann
by Schultes, Richard Evans y Robert Raffauf
by Schultes, Richard Evans; Davis, Wade; Murray, Chris; et al.