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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Tregarthen, J. C. (John Coulson),
    Publication info: London, J. Murray, 1909
    Holding Institution: University of Toronto - Gerstein Science Information Centre
  2. By: Tregarthen, J. C. (John Coulson),
    Publication info: New York, Hearst's International Library, 1915
    Holding Institution: American Museum of Natural History Library