Books about Unidentified flying objects (sorted by popularity)
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Displaying results 1–6
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The Report on Unidentified Flying Objects Edward J. Ruppelt 481 downloads
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The Flying Saucers are Real Donald E. Keyhoe 328 downloads
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The World of Flying Saucers: A Scientific Examination of a Major Myth of the Space Age Donald H. Menzel and Lyle Gifford Boyd 315 downloads
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Federal Bureau of Investigation FOIA Documents - Unidentified Flying Objects United States. Federal Bureau of Investigation 239 downloads
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USAF Fact Sheet 95-03 United States. Air Force 191 downloads
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The Flying Saucers are Real Donald E. Keyhoe 66 downloads
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Displaying results 1–6