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The originator of Erhard Seminars Training ( est ) was John Paul (Jack) Rosenberg (1935- ), who changed his name to Werner Hans Erhard. ... Erhard's seminars became particularly controversial because of the conditions to which participants were subjected.
George D. Chryssides (2011). Historical Dictionary of New Religious Movements. Scarecrow Press. p. 125. ISBN 0810861941. | ||
