Sikorsky, Igor Ivan 1889-1972 creator mixed material monographic eng 50 3 1.0 Correspondence, speeches, writings including the original manuscript of Sikorsky's autobiography, The Story of the Winged-S; An Autobiography (1938), engineering sketch books, photographs, and other papers relating chiefly to Sikorsky's activities as a pioneer in aviation especially in the development of the helicopter and to his company, Sikorsky Aviation Corporation, later United Aircraft Corporation's Sikorsky Aircraft Division. Documents his work relating to military aviation. Open to research. Engineer, inventor, and pioneer of aviation. Collection material in English. Sikorsky Aviation Corporation. United Aircraft Corporation. Sikorsky Aircraft Division. Aeronautics Aeronautics, Military Aircraft industry United States Airplanes Helicopter industry United States Helicopters Sikorsky helicopters Engineers Inventors Sikorsky, Igor Ivan, 1889-1972 mm 82040014 Open to research. DLC 820519 20260227111714.0 mm 82040014