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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Wilckens, Martin, - Duerst, J. Ulrich
    Edition: 2d aufl.
    Publication info: Leipzig [Germany], Richard Carl Schmidt & Co, 1905
    Holding Institution: Smithsonian Libraries and Archives
  2. By: Duerst, J. Ulrich
    Publication info: Berlin, G. Reimer; [etc., etc.], 1899
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library