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  1. By: Enders, H E - Scott, H E
    Type: Article
    In: The Auk
    Volume: 34
    Date: 1917
    Page Range: 494--495
    Publication Info: Washington, D.C, American Ornithologists' Union, etc, 1884-
  2. By: Enders, H E
    Type: Article
    In: Journal of morphology
    Volume: 20
    Date: 1909
    Page Range: 479--531
    Publication Info: Boston, Ginn & Co, [1887-1924]