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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Winkler, Hans,
    Publication info: Jena, G. Fischer, 1908
    Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library
  2. By: Winkler, Hans,
    Publication info: Jena, G. FIscher, 1920
    Holding Institution: MBLWHOI Library