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by Ruck, Carl A. P.
by Wasson, R. Gordon; Hofmann, Albert; Ruck, Carl A. P.; et al.
by Ruck, Carl A. P.; Hoffman, Mark Alwin
by Wasson, Robert Gordon, Albert Hofmann y Carl A. P. Ruck
by Wasson, Robert Gordon; Ruck, Carl A. P.; Hofmann, Albert
by Aiken, M.D., John W.; Potter, Beverly A.; Marinacci, Mike; et al.
by Ruck, Carl A. P.; Hoffman, Mark A. (CON); Holmberg, Evie Marie (CON); et al.