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Helicopter Man: Igor Sikorsky and His Amazing Invention (Genius at Work! Great Inventor Biographies)
Product ID : 18504761
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18504761
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2,038
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About Helicopter Man: Igor Sikorsky And His Amazing
Leonard da Vinci drew pictures of helicopters; Wilbur Wright said they would never work. But Igor Sikorsky proved him wrong, inventing the first working helicopter and building the company that still bears his name.
