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  1. 1

    The edge of reality a progress report on Unidentified Flying Objects by Hynek, Joseph Allen 1910

    Published 1975
    Book


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  2. 2

    The UFO experience; a scientific inquiry. by Hynek, Joseph Allen 1910

    Published 1972
    Book


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  3. 3

    Philippine UFOsn an anthology of strange real-life UFO encounters in the country by Zerrudo, Nelson V.

    Published 1987
    Book


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  4. 4

    Mysteries of the skies UFOs in perspective by Lore, Gordon I. R.

    Published 1968
    Book


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  5. 5

    Final report of the scientific study of unidentitfied flying objects editor. With an intro. by Walter Sullivan. by Condon, Edward Uhler 1902

    Published 1969
    Book


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  6. 6

    UFO's--identified by Klass, Philip J.

    Published 1968
    Book


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