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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Kramers, J. G.
    Publication info: Batavia, G. Kolff & Co, 1899-1904
    Holding Institution: Harvard University Botany Libraries
  2. By: Kramers, J. G.
    Publication info: Batavia--'s Gravenhage, G. Kolff & Co, 1898
    Holding Institution: Harvard University Botany Libraries