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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Ernst, Harold C. (Harold Clarence),
    Publication info: Boston, Little, Brown, 1902
    Holding Institution: MBLWHOI Library
  2. By: Ernst, Harold C. (Harold Clarence), - Massachusetts Society for Promoting Agriculture.
    Publication info: Boston, The Society, 1895
    Holding Institution: UMass Amherst Libraries
  3. By: Ernst, Harold C. (Harold Clarence),
    Publication info: Boston, Publicaton Office of Journal of Medical Research, 1903
    Holding Institution: MBLWHOI Library