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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Dickson, Leonard E. (Leonard Eugene),
    Publication info: Washington, Carnegie Institution of Washington, 1919-23
    Holding Institution: University of Toronto - Gerstein Science Information Centre
  2. By: Dickson, Leonard E. (Leonard Eugene),
    Publication info: Washington, Carnegie Institution of Washington, 1919-
    Holding Institution: University of California Libraries
  3. By: Dickson, Leonard E. (Leonard Eugene),
    Publication info: Leipzig, B.G. Teubner, 1901
    Holding Institution: University of California Libraries