Books by Lyle Gifford Boyd:
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Boyd, Lyle Gifford, 1907-: The World of Flying Saucers: A Scientific Examination of a Major Myth of the Space Age (Garden City, NY: Doubleday, 1963), also by Donald H. Menzel (page images at HathiTrust)
Additional books by Lyle Gifford Boyd in the extended shelves:
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Boyd, Lyle Gifford, 1907-: The World of Flying Saucers: A Scientific Examination of a Major Myth of the Space Age, also by Donald H. Menzel (Gutenberg ebook)
Find more by Lyle Gifford Boyd at your library, or elsewhere.