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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Petzholdt, Georg Paul Alexander,
    Publication info: Dresdae, Prostat in Libraria Arnoldia, 1841
    Holding Institution: Harvard University Botany Libraries
  2. By: Petzholdt, Georg Paul Alexander,
    Publication info: Dresden, Arnold, 1841
    Holding Institution: Harvard University Botany Libraries