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  1. By: Yeo, Gerald F. (Gerald Francis)
    Publication info: Philadelphia, Blakiston, 1884
    Holding Institution: Columbia University Libraries
  2. By: Yeo, Gerald F. (Gerald Francis)
    Edition: Second American edition revised by the author.
    Publication info: Philadelphia, Blakiston, 1886
    Holding Institution: University of Toronto - Gerstein Science Information Centre
  3. By: Yeo, Gerald F. (Gerald Francis)
    Publication info: Philadelphia, P. Blakiston, son & co, 1884
    Holding Institution: University of California Libraries