LIBROS-IDEAS
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Available in Française, Español, Português, Deutsch, Россию, 中文, 日本, and others. mong the many scientific books and papers that Wilbur waded through was James Bell Pettigrew's Animal Locomotion, or Walking , Swimming, and Flying, With a Dissertation on Aeronautics. Pettigrew confirmed Will's observation that birds twisted their wings in flight.
