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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Pennsylvania Horticultural Society. Library.
    Publication info: Philadelphia: Pennsylvania Horticultural Society,
    Holding Institution: Pennsylvania Horticultural Society
    BHL Collections: Expanding Access to Biodiversity Literature
  2. By: Pennsylvania Horticultural Society. Library.
    Publication info: Philadelphia, Pa, Pennsylvania Horticultural Society, 1941
    Holding Institution: Penn State University