Books by Gregory August Hyver:
Books in the extended shelves:
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Hyver, Gregory August: The optimization of a relay controlled system subjected to random disturbances. (For sale by the Clearinghouse for Federal Scientific and Technical Information, 1966), also by United States National Aeronautics and Space Administration and Stanford University (page images at HathiTrust)
Find more by Gregory August Hyver at your library, or elsewhere.