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1. 2. 3. Approved For Release 20000P RY CER SSIPI EI 1001800018 BIBLIOGRAPHY for Houtkooper, J.M. "A Study of Repeated Retroactive Psychokinesis in Relation to Direct and Random PK Effects,® European Journal of Farapsychology vol. 1, "Relationships Between PK and Physiological Variables in a Gifted Subject," European Journal of Parapsychology vol. 2 , “A Hierarchial Model for the Observational Theories: A Study of Subject Identity and Feedback in Repeated Psychokinesis,”® European Journal of Parapsychology vol. 3 , B-34 Approved For Release 2000/daK0N GLASSIFIED 1800130001-9 No. No. No. Date: 05/77 4, p. 001 Date: 11/77 1 , p. 068 Date: 11/80 3), p. 221