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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Naturforschende Gesellschaft in Basel.
    Publication info: Basel, Naturforschende Gesellschaft in Basel,
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
  2. By: Naturforschende Gesellschaft in Basel.
    Publication info: Basel, Birkhäuser,
    Holding Institution: Multiple institutions