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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)
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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)
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The water-relation between plant and soil,
By: Livingston, Burton Edward, - Hawkins, Lon Adrian, - Pulling, Howard Edward.
Publication info: Washington, D. C.,Carnegie Institution of Washington,1915.
Contributed by: Cornell University Library
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