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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Ehrenbaum, Ernst,
    Publication info: Leipzig, Wilhelm Engelmann, 1884
    Holding Institution: Smithsonian Libraries and Archives
  2. By: Ehrenbaum, Ernst,
    Publication info: Berlin, W. Moeser Hofbuchhandlung, 1890
    Holding Institution: Smithsonian Libraries and Archives
  3. By: Ehrenbaum, Ernst,
    Publication info: Berlin, W. Moefer, 1892
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library