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  1. By: Fresquez, Philip R. - Aldon, Earl F. - Dennis, G. L. - Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.) - United States. Forest Service.
    Publication info: [Fort Collins, Colo.], UDSA Forest Service, Rocky Mountain Forest and Range Experiment Station, [1988]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  1. By: Dennis, G. L.
    Type: Article
    In: The Emu : official organ of the Australasian Ornithologists' Union
    Volume: 4
    Issue: 2
    Date: 1904-10-01
    Page Range: 67--67
    Publication Info: Melbourne Royal Australasian Ornithologists Union 1901-
  2. By: Dennis, G. L.
    Type: Article
    In: The Emu : official organ of the Australasian Ornithologists' Union
    Volume: 3
    Issue: 2
    Date: 1903-10-01
    Page Range: 117--118
    Publication Info: Melbourne Royal Australasian Ornithologists Union 1901-