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  1. Quantitative relationships of carbon, phosphorus, and nitrogen in soils ...
    By: Stewart, Robert,
    Publication info: Urbana,1910
    Contributed by: Library of Congress
    BHL Collections: Library of Congress
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  2. Quantitative relationships of carbon, phosphorus, and nitrogen in soils ...
    By: Stewart, Robert,
    Publication info: Urbana,1910
    Contributed by: University of California Libraries (archive.org)
    View Book