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  1. By: Douglas, James,
    Publication info: London :Printed by G. Strahan,1725.
    Holding Institution: Harvard University Botany Libraries
    BHL Collections: Harvard University Herbarium, Botany Libraries
  2. By: Douglas, James,
    Publication info: London :Printed for T. Woodward,1727.
    Holding Institution: Harvard University Botany Libraries
    BHL Collections: Harvard University Herbarium, Botany Libraries
  3. By: Douglas, James,
    Publication info: PhiladelphiaMacCalla1898
    Holding Institution: University of Toronto - Gerstein Science Information Centre