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2. Badone , Ellen 1988 Power and Fear: Reconstructing Witchcraft Experiences in Brittany
3. Badone , Ellen 1990 Magnetism, Spells and Pendulums: Alternative Healing and Biomedicine in Brittany
4. Now You See It An “Unbelievable” Experiment Is Found to Be Unbelievable;Beardsley;Scientific American,1988