The influence of calcium, magnesium and potassium nitrates upon the toxicity of certain heavy metals toward fungus spores ...

"Botanical contribution from the John Hopkins university no. 31."From Physiological researches, vol. I, no. 2, serial no. 2, August, 1913.Vita.Thesis (Ph. D.)--John Hopkins university, 1913."Literature cited": p. 91-92.Mode of access: Internet