J. Allen Hynek
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The UFO Experience: A Scientific Inquiry
J. Allen Hynek
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The Edge of Reality: A Progress Report on Unidentified Flying Objects
Joseph Allen, Hynek
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The Edge of Reality: Two Scientists Evaluate What We Know of the UFO Phenomenon (MUFON)
Hynek, J. Allen; Vallee, Jacques
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The UFO Experience: Evidence Behind Close Encounters, Project Blue Book, and the Search for Answers (MUFON)
Hynek, J. Allen
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Night Siege: The Hudson Valley Ufo Sightings
Hynek, J. Allen; Imbrogno, Philip J.; Pratt, Bob
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UFO Experience : A Scientific Enquiry
Hynek, J Allen
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