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0-9
Unidentified flying objects
(6)
The Flying Saucers are Real [electronic resource] / Donald E. Keyhoe
The Flying Saucers are Real [electronic resource] / Donald E. Keyhoe
The Report on Unidentified Flying Objects [electronic resource] / Edward J. Ruppelt
Federal Bureau of Investigation FOIA Documents - Unidentified Flying Objects [electronic resource] / United States. Federal Bureau of Investigation
USAF Fact Sheet 95-03 : Unidentified Flying Objects and Air Force Project Blue Book [electronic resource] / United States. Air Force
The World of Flying Saucers : A Scientific Examination of a Major Myth of the Space Age [electronic resource] / Lyle Gifford Boyd
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