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Pioneering aviation engineer (1889-1972) who developed the first four-engine airplane and the first modern helicopter to be put into widespread use. Signed book: The Story of the Winged-S. Later printing. NY: Dodd, Mead & Company, 1941. Hardcover with dust jacket, 6 x 8.75, 275 pages. Signed opposite the half-title page in fountain pen, "To Mr. Thomas C. Crider, With kindest personal regards of I. Sikorsky, July 2, 1942." In fine condition, with some wear and paper loss only to the dust jacket.
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