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  1. By: Trotter, Spencer
    Type: Article
    In: Proceedings of the Academy of Natural Sciences of Philadelphia
    Volume: 43
    Date: 1891
    Page Range: 118--120
    Publication Info: Philadelphia, Academy of Natural Sciences of Philadelphia,
  2. By: Trotter, Spencer
    Type: Article
    In: The Auk
    Volume: 26
    Date: 1909
    Page Range: 221--233
    Publication Info: Washington, D.C, American Ornithologists' Union, etc, 1884-
  3. By: Trotter, Spencer
    Type: Article
    In: The Auk
    Volume: 26
    Date: 1909
    Page Range: 346--363
    Publication Info: Washington, D.C, American Ornithologists' Union, etc, 1884-
  4. By: Stone, Witmer. - Rhoads, Samuel N. (Samuel Nicholson), - Trotter, Spencer - Moore, Robert Thomas - Ehinger, C E - Fowler, Henry W., - Emlen, Arthur C - Scoville - Roberts, William E - Bacon, Francis L - Carter, John D - Jackson, Thomas Hoopes, - Cope, E. D. (Edward Drinker), - Bartram, Edwin B. (Edwin Bunting), - Evans, William B - Weygandt, Cornelius
    Type: Article
    In: The Auk
    Volume: 37
    Date: 1920
    Page Range: 179--180
    Publication Info: Washington, D.C, American Ornithologists' Union, etc, 1884-
  5. By: Trotter, Spencer
    Type: Article
    In: The Auk
    Volume: 29
    Date: 1912
    Page Range: 255--256
    Publication Info: Washington, D.C, American Ornithologists' Union, etc, 1884-
  6. By: Trotter, Spencer
    Type: Article
    In: The Auk
    Volume: 20
    Date: 1903
    Page Range: 249--262
    Publication Info: Washington, D.C, American Ornithologists' Union, etc, 1884-
  7. By: Trotter, Spencer
    Type: Article
    In: The Auk
    Volume: 19
    Date: 1902
    Page Range: 206--208
    Publication Info: Washington, D.C, American Ornithologists' Union, etc, 1884-
  8. By: Trotter, Spencer
    Type: Article
    In: Proceedings of the Academy of Natural Sciences of Philadelphia
    Volume: 29
    Date: 1877
    Page Range: 292--292
    Publication Info: Philadelphia, Academy of Natural Sciences of Philadelphia,
  9. By: Trotter, Spencer
    Type: Article
    In: The Auk
    Volume: 29
    Date: 1912
    Page Range: 159--165
    Publication Info: Washington, D.C, American Ornithologists' Union, etc, 1884-
  10. By: Trotter, Spencer
    Type: Article
    In: The Auk
    Volume: 4
    Date: 1887
    Page Range: 307--310
    Publication Info: Washington, D.C, American Ornithologists' Union, etc, 1884-
  11. By: Trotter, Spencer
    Type: Article
    In: The Auk
    Volume: 21
    Date: 1904
    Page Range: 55--64
    Publication Info: Washington, D.C, American Ornithologists' Union, etc, 1884-