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  1. Plan for cooperating in the study of available plant food.
    By: Moore, Charles C.
    Publication info: Washington,1902.
    Contributed by: University of California Libraries (archive.org)
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  2. Preliminary crop and soil data for the cooperative study of available plant food.
    By: Moore, Charles C.
    Publication info: Washington,1903.
    Contributed by: University of California Libraries (archive.org)
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