Showing 1 - 4 results of 4 for search 'Gilfillan, S. Colum, 1889-', query time: 0.01s Refine Results
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    Invention and the patent system by Gilfillan, S. Colum, 1889-

    Published 1964
    Book
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    The social effects of aviation by Ogburn, William Fielding, 1886-1959

    Published 1946
    Other Authors:
    Book