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  1. By: Walton, George Lincoln,
    Edition: 2d rev. ed.
    Publication info: Philadelphia, J.B. Lippincott[©1916]
    Holding Institution: Pennsylvania Horticultural Society
    BHL Collections: Expanding Access to Biodiversity Literature
  2. By: Walton, George Lincoln,
    Publication info: Philadelphia :Lippincott,1909.
    Holding Institution: University of Toronto - Gerstein Science Information Centre
  3. By: Walton, George Lincoln,
    Publication info: Philadelphia,J.B. Lippincott company,1909.
    Holding Institution: University of California Libraries (archive.org)