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by Ratsch, Christian; Hofmann, Albert; Baker, John R.
by Wasson, R. Gordon; Hofmann, Albert; Ruck, Carl A. P.; et al.
by Hofmann, Albert; Moynihan, Annabel; Ratsch, Christian; et al.
by Forte, Robert; Hofmann, Albert (CON); Wasson, R. Gordon (CON); et al.
by Schultes, Richard Evans; Hofmann, Albert; Rätsch, Christian
by Hofmann, Albert
by Hofmann, Aldous; Huxley, Albert
by Albert Hofmann