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  1. By: Ward, Henry L
    Type: Article
    In: The Auk
    Volume: 25
    Date: 1908
    Page Range: 226--228
    Publication Info: Washington, D.C, American Ornithologists' Union, etc, 1884-
  2. By: Ward, Henry L
    Type: Article
    In: The American naturalist
    Volume: 25
    Date: 1891
    Page Range: 743--753
    Publication Info: Chicago, Ill. [etc.], Published for the American Society of Naturalists by the University of Chicago Press [etc.],
  3. By: Ward, Henry L
    Type: Article
    In: The Auk
    Volume: 24
    Date: 1907
    Page Range: 233--234
    Publication Info: Washington, D.C, American Ornithologists' Union, etc, 1884-