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  1. By: Canada. Forestry Branch. - Millar, Willis Norman.
    Publication info: Ottawa, 1920
    Holding Institution: University of California Libraries
    Subjects: Canada  Forests and forestry  Signals and signaling  Telephone  
  2. By: United States. Forest Service.
    Publication info: Washington, Govt. Print. Off, 1915
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Forest reserves  Telephone  United States  
  3. By: Bennett, Alfred Rosling,
    Publication info: London, Longmans, Green, 1895
    Holding Institution: University of California Libraries
    Subjects: Europe  Telephone