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  1. By: Hay, Oliver Perry,
    Publication info: Indianapolis :Wm. B. Burford,1892.
    Holding Institution: Smithsonian Libraries
  2. By: Hay, Oliver Perry,
    Publication info: Indianapolis :Wm. B. Burford,1892.
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
  3. By: Hay, Oliver Perry,
    Publication info: Washington :Govt. Print. Off.,1902.
    Holding Institution: University of California Libraries (archive.org)
  4. By: Hay, Oliver Perry,
    Publication info: 1907
    Holding Institution: American Museum of Natural History Library
  5. By: Hay, Oliver Perry,
    Publication info: 1906
    Holding Institution: American Museum of Natural History Library
  6. By: Hay, Oliver Perry,
    Publication info: Washington, D.C. :Pub. by the Carnegie Institution of Washington,1908.
    Holding Institution: University of California Libraries (archive.org)
  7. By: Hay, Oliver Perry,
    Publication info: Washington, D.C.,Pub. by the Carnegie Institution of Washington,1908.
    Holding Institution: Smithsonian Libraries
  8. By: American University of Beirut. - Day, Alfrid. - Hay, Oliver Perry,
    Publication info: 1903
    Holding Institution: American Museum of Natural History Library
  9. By: Cope, E. D. (Edward Drinker), - Hay, Oliver Perry,
    Publication info: 1903
    Holding Institution: American Museum of Natural History Library
  10. By: Hay, Oliver Perry,
    Publication info: Chicago,1895
    Holding Institution: University Library, University of Illinois Urbana Champaign
  11. By: Hay, Oliver Perry,
    Publication info: Chicago,1896
    Holding Institution: University Library, University of Illinois Urbana Champaign
  12. By: Hay, Oliver Perry,
    Publication info: 1905
    Holding Institution: American Museum of Natural History Library
  13. By: Hay, Oliver Perry,
    Publication info: Baltimore, Md. :Williams & Wilkins company,1910.
    Holding Institution: University of California Libraries (archive.org)
  14. By: Hay, Oliver Perry,
    Publication info: Chicago,1896
    Holding Institution: University Library, University of Illinois Urbana Champaign
  15. By: Hay, Oliver Perry, - Wortman, Jacob Lawson.
    Publication info: 1905
    Holding Institution: American Museum of Natural History Library
  16. By: Hay, Oliver Perry,
    Publication info: Chicago,1895
    Holding Institution: University Library, University of Illinois Urbana Champaign
  17. By: Hay, Oliver Perry,
    Publication info: 1906
    Holding Institution: American Museum of Natural History Library
  18. By: Hay, Oliver Perry,
    Publication info: WashingtonCarnegie Institution of Washington1923
    Holding Institution: University of Toronto - Gerstein Science Information Centre
  19. By: Hay, Oliver Perry,
    Publication info: Washington :The Carnegie institution of Washington,1924.
    Holding Institution: ASC - York University Libraries (archive.org)
  20. By: Hay, Oliver Perry,
    Publication info: Washington :Smithsonian Institution,1912.
    Holding Institution: University of California Libraries (archive.org)
  21. By: Brown, Barnum. - Hay, Oliver Perry,
    Publication info: 1905
    Holding Institution: American Museum of Natural History Library
  1. By: Hay, Oliver Perry,
    Type: Article
    In: Journal of the Washington Academy of Sciences.
    Volume: 18
    Date: 1928
    Page Range: 233--241
    Publication info: Washington [etc.,Washington Academy of Sciences]
  2. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 46
    Issue: 2025
    Date: 1913
    Page Range: 267--277
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  3. By: Hay, Oliver Perry,
    Type: Article
    In: Journal of the Washington Academy of Sciences.
    Volume: 18
    Date: 1928
    Page Range: 421--430
    Publication info: Washington [etc.,Washington Academy of Sciences]
  4. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 68
    Issue: 2625
    Date: 1926
    Page Range: 1--18
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  5. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 49
    Issue: 2113
    Date: 1915
    Page Range: 381--397
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  6. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 10
    Issue: 624
    Date: 1887-07-02
    Page Range: 242--253
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  7. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 48
    Issue: 2086
    Date: 1915
    Page Range: 515--575
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  8. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 61
    Issue: 2438
    Date: 1922
    Page Range: 1--4
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  9. By: Hay, Oliver Perry,
    Type: Article
    In: Annals of the Carnegie Museum.
    Volume: 2
    Date: 1903
    Page Range: 201--203
    Publication info: [Pittsburgh] :Published by authority of the Board of Trustees of the Carnegie Institute,1901-
  10. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 8
    Issue: 512
    Date: 1885
    Page Range: 209--213
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  11. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 53
    Date: 1917
    Page Range: 435--443
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  12. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 53
    Issue: 2198
    Date: 1917
    Page Range: 219--221
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  13. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the Biological Society of Washington.
    Volume: 37
    Date: 1924
    Page Range: 1--19
    Publication info: Washington,Biological Society of Washington
  14. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 36
    Issue: 1665
    Date: 1909
    Page Range: 191--196
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  15. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 38
    Issue: 1747
    Date: 1910
    Page Range: 307--326
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  16. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 35
    Issue: 1640
    Date: 1908
    Page Range: 161--169
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  17. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 56
    Issue: 2291
    Date: 1919
    Page Range: 103--112
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  18. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 58
    Issue: 2328
    Date: 1920
    Page Range: 83--146
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  19. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge.
    Volume: 39
    Issue: 161
    Date: 1900
    Page Range: 96--123
    Publication info: Philadelphia :American Philosophical Society
  20. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 59
    Issue: 2391
    Date: 1921
    Page Range: 599--642
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  21. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 51
    Issue: 2147
    Date: 1916
    Page Range: 107--123
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  22. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 22
    Issue: 1181
    Date: 1899
    Page Range: 21--24
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  23. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the Academy of Natural Sciences of Philadelphia.
    Volume: 54
    Date: 1902
    Page Range: 383--388
    Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
  24. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 46
    Issue: 2021
    Date: 1913
    Page Range: 161--200
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  25. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge.
    Volume: 50
    Issue: 200
    Date: 1911
    Page Range: 452--455
    Publication info: Philadelphia :American Philosophical Society
  26. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 73
    Issue: 2724
    Date: 1928
    Page Range: 1--12
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  27. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the Biological Society of Washington.
    Volume: 35
    Date: 1922
    Page Range: 97--101
    Publication info: Washington,Biological Society of Washington
  28. By: Hay, Oliver Perry,
    Type: Article
    In: The Annals and magazine of natural history; zoology, botany, and geology
    Volume: 3
    Series: 7
    Date: 1899
    Page Range: 480--487
    Publication info: London,Taylor and Francis, Ltd.
  29. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 32
    Issue: 1528
    Date: 1907
    Page Range: 271--273
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  30. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 8
    Issue: 537
    Date: 1885-10-26
    Page Range: 552--559
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  31. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 44
    Issue: 1969
    Date: 1913
    Page Range: 569--594
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  32. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the Biological Society of Washington.
    Volume: 35
    Date: 1922
    Page Range: 53--54
    Publication info: Washington,Biological Society of Washington
  33. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 3
    Issue: 179
    Date: 1881-02-23
    Page Range: 488--515
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  34. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 42
    Issue: 1884
    Date: 1912
    Page Range: 31--38
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  35. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 35
    Issue: 1648
    Date: 1908
    Page Range: 351--366
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  36. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 15
    Issue: 909
    Date: 1892
    Page Range: 385--397
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  37. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 15
    Issue: 907
    Date: 1892
    Page Range: 375--378
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  38. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge.
    Volume: 42
    Issue: 174
    Date: 1903
    Page Range: 268--274
    Publication info: Philadelphia :American Philosophical Society
  39. By: Hay, Oliver Perry,
    Type: Article
    In: The Auk.
    Volume: 19
    Date: 1902
    Page Range: 255--258
    Publication info: Washington, D.C. :American Ornithologists' Union, etc.,1884-
  40. By: Hay, Oliver Perry,
    Type: Article
    In: Journal of the Washington Academy of Sciences.
    Volume: 20
    Date: 1930
    Page Range: 501--509
    Publication info: Washington [etc.,Washington Academy of Sciences]
  41. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 37
    Issue: 1699
    Date: 1909
    Page Range: 43--61
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  42. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 36
    Issue: 1660
    Date: 1909
    Page Range: 95--108
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  43. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the Biological Society of Washington.
    Volume: 37
    Date: 1924
    Page Range: 109--112
    Publication info: Washington,Biological Society of Washington
  44. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 34
    Date: 1908
    Page Range: 183--198
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  45. By: Hay, Oliver Perry,
    Type: Article
    In: Annals of the Carnegie Museum.
    Volume: 3
    Date: 1904
    Page Range: 178--182
    Publication info: [Pittsburgh] :Published by authority of the Board of Trustees of the Carnegie Institute,1901-
  46. By: Hay, Oliver Perry,
    Type: Article
    In: The Auk.
    Volume: 4
    Date: 1887
    Page Range: 193--196
    Publication info: Washington, D.C. :American Ornithologists' Union, etc.,1884-
  47. By: Hay, Oliver Perry,
    Type: Article
    In: Journal of the Washington Academy of Sciences.
    Volume: 20
    Date: 1930
    Page Range: 331--340
    Publication info: Washington [etc.,Washington Academy of Sciences]
  48. By: Hay, Oliver Perry,
    Type: Article
    In: Journal of the Washington Academy of Sciences.
    Volume: 15
    Date: 1925
    Page Range: 381--387
    Publication info: Washington [etc.,Washington Academy of Sciences]
  49. By: Hay, Oliver Perry,
    Type: Article
    In: Journal of the Washington Academy of Sciences.
    Volume: 15
    Date: 1925
    Page Range: 126--133
    Publication info: Washington [etc.,Washington Academy of Sciences]
  50. By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 15
    Issue: 908
    Date: 1892
    Page Range: 379--383
    Publication info: Washington :Smithsonian Institution Press, [etc.]
  51. By: Hay, Oliver Perry,
    Type: Article
    In: Journal of the Washington Academy of Sciences.
    Volume: 16
    Date: 1926
    Page Range: 35--41
    Publication info: Washington [etc.,Washington Academy of Sciences]