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Please read BHL's Acknowledgment of Harmful Content
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  1. By: MacLean, J. P. (John Patterson),
    Edition: 2d ed.
    Publication info: Cincinnati,R. Clarke,1880 [c1878]
    Holding Institution: Smithsonian Libraries
  2. By: MacLean, J. P. (John Patterson),
    Publication info: Cincinnati,Williamson & Cantwell publishing co.,1878.
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
    BHL Collections: Unearthed! Smithsonian Libraries' Paleo Collection