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  1. By: Widmann, O
    Type: Article
    In: The Auk.
    Volume: 13
    Date: 1896
    Page Range: 264--264
    Publication info: Washington, D.C. :American Ornithologists' Union, etc.,1884-
  2. By: Widmann, O
    Type: Article
    In: The Auk.
    Volume: 12
    Date: 1895
    Page Range: 350--355
    Publication info: Washington, D.C. :American Ornithologists' Union, etc.,1884-
  3. By: Widmann, O
    Type: Article
    In: The Auk.
    Volume: 15
    Date: 1898
    Page Range: 22--27
    Publication info: Washington, D.C. :American Ornithologists' Union, etc.,1884-
  4. By: Widmann, O
    Type: Article
    In: The Auk.
    Volume: 12
    Date: 1895
    Page Range: 219--225
    Publication info: Washington, D.C. :American Ornithologists' Union, etc.,1884-
  5. By: Widmann, O
    Type: Article
    In: The Auk.
    Volume: 19
    Date: 1902
    Page Range: 232--237
    Publication info: Washington, D.C. :American Ornithologists' Union, etc.,1884-
  6. By: Widmann, O
    Type: Article
    In: The Auk.
    Volume: 13
    Date: 1896
    Page Range: 216--222
    Publication info: Washington, D.C. :American Ornithologists' Union, etc.,1884-
  7. By: Widmann, O
    Type: Article
    In: The Auk.
    Volume: 26
    Date: 1909
    Page Range: 304--304
    Publication info: Washington, D.C. :American Ornithologists' Union, etc.,1884-
  8. By: Widmann, O
    Type: Article
    In: The Auk.
    Volume: 14
    Date: 1897
    Page Range: 305--310
    Publication info: Washington, D.C. :American Ornithologists' Union, etc.,1884-
  9. By: Widmann, O
    Type: Article
    In: The Auk.
    Volume: 12
    Date: 1895
    Page Range: 112--117
    Publication info: Washington, D.C. :American Ornithologists' Union, etc.,1884-
  10. By: Widmann, O
    Type: Article
    In: The Auk.
    Volume: 18
    Date: 1901
    Page Range: 150--157
    Publication info: Washington, D.C. :American Ornithologists' Union, etc.,1884-
  11. By: Widmann, O
    Type: Article
    In: The Auk.
    Volume: 12
    Date: 1895
    Page Range: 1--11
    Publication info: Washington, D.C. :American Ornithologists' Union, etc.,1884-
  12. By: Widmann, O
    Type: Article
    In: The Auk.
    Volume: 21
    Date: 1904
    Page Range: 66--73
    Publication info: Washington, D.C. :American Ornithologists' Union, etc.,1884-