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  1. Soils and soil cultivation, a non-technical manual on the management of soil for the production and maintenance of fertility, by Frank D. Gardner ... assisted by R.U. Blasingame ...
    By: Gardner, Frank Duane, - Blasingame, Ralph Upshaw.
    Publication info: Chicago,The John C. Winston Company[c1918]
    Holding Institution: University of California Libraries (archive.org)
    View Book