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  1. Practical talks on farm engineering : A simple explanation of many everyday problems in farm engineering and farm mechanics written in a readable style for the practical farmer / by R. P. Clarkson ; illustrated from photographs and diagrams.
    By: Clarkson, Ralph Preston, - History of Engineering Collection (North Carolina State University).
    Publication info: Garden City, N.Y. :Doubleday, Page & Company,1915
    Contributed by: NCSU Libraries (archive.org)
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