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  1. The influence of calcium, magnesium and potassium nitrates upon the toxicity of certain heavy metals toward fungus spores ... by Lon A. Hawkins.
    By: Hawkins, Lon Adrian,
    Publication info: Baltimore,1913.
    Contributed by: University of California Libraries (archive.org)
    Subjects: Fungicides  Plants, Effect of chemicals on  
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  2. The influence of calcium, magnesium and potassium nitrates upon the toxicity of certain heavy metals toward fungus spores ...
    By: Hawkins, Lon Adrian,
    Publication info: Baltimore,1913.
    Contributed by: The Johns Hopkins University Sheridan Libraries (archive.org)
    Subjects: Fungicides  Plants, Effect of chemicals on  
    View Book
  3. Stimulation of root growth in cuttings by treatment with chemical compounds ...
    By: Curtis, Otis Freeman,
    Publication info: Ithaca,1918
    Contributed by: Cornell University Library
    Subjects: Plants, Effect of chemicals on  Roots (Botany)  
    View Book