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× 1985 Andrew Junker- Systems Engineering Based Methodology on Brain Wave Entrainment to ELF Visual Stimuli 1985 Andrew Junker- Systems Engineering Based Methodology on Brain Wave Entrainment to ELF Visual Stimuli $9.99
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× 1989 Paul Laffoley- Elements of the Time Machine 1989 Paul Laffoley- Elements of the Time Machine $9.99
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