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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Ecological Society of America. Committee on the Preservation of Natural Conditions. - Shelford, Victor E. (Victor Ernest),
    Publication info: Baltimore, Williams & Wilkins, 1926
    Holding Institution: MBLWHOI Library
  2. By: Ecological Society of America. Committee on the Preservation of Natural Conditions. - Shelford, Victor E. (Victor Ernest),
    Publication info: Baltimore, Williams & Wilkins, 1926
    Holding Institution: Prelinger Library