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  1. The spirit of the soil; or, An account of nitrogen fixation in the soil by bacteria and of the production of auximones in bacterized peat, by Gordon D. Knox ... with a foreword by Professor W.B. Bottomley ...
    By: Knox, Gordon Daniell.
    Edition: 2nd impression.
    Publication info: New York,Stokes[1916]
    Contributed by: University of California Libraries (archive.org)
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