2
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Gatekeeper : memoirs of a CIA polygraph examiner : Sullivan, John F.,
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2007
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1
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3
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Gatekeeper, moderator, synthesizer / / Michael V. Butera --
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2010
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1
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6
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Gatekeepers -- / Ch. 11. : McKercher, Bob.
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2002
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1
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12
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Gatekeepers of winner take all -- / Chapter fifteen. : Hill, Steven,
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2002
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1
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