About this Collection
Collection contains correspondence, lectures, reports, designs, photographs, patents, and related printed material concerning the technical and historical aspects of aeronautics, including the development of the helicopter and the gyroscope. The collection comprises the professional papers of Alexander Klemin as well as materials used by him as a professor. Of note is an alphabetical subject index of more than 150,000 entries to articles about helicopters, aviation, and gyroscopes in many technical journals.
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