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  1. By: Haeckel, Ernst,
    Publication info: Leipzig, W. Engelmann, 1896
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
  2. By: Haeckel, Ernst,
    Edition: 6. verb. Aufl.
    Publication info: Leipzig, W. Engelmann, 1910
    Holding Institution: Smithsonian Libraries
  3. By: Haeckel, Ernst, - Royal College of Physicians of Edinburgh.
    Edition: 4., umgearb. und verm. Aufl.
    Publication info: Leipzig, W. Engelmann, 1891
    Holding Institution: Royal College of Physicians in Edinburgh (archive.org)
  4. By: Haeckel, Ernst, - Royal College of Physicians of Edinburgh.
    Edition: 4., umgearb. und verm. Aufl.
    Publication info: Leipzig, W. Engelmann, 1891
    Holding Institution: Royal College of Physicians in Edinburgh (archive.org)
  5. By: Haeckel, Ernst, - Royal College of Physicians of Edinburgh.
    Edition: 2. unveränderte Aufl.
    Publication info: Leipzig, Engelmann, 1874
    Holding Institution: Royal College of Physicians in Edinburgh (archive.org)
  6. By: Haeckel, Ernst,
    Edition: 2. unveränderte Aufl.
    Publication info: Leipzig, W. Engelmann, 1874
    Holding Institution: University of Toronto - Thomas Fisher Rare Book Library
  7. By: Haeckel, Ernst,
    Edition: 3. umgearb. aufl.
    Publication info: Leipzig, W. Engelmann, 1877
    Holding Institution: MBLWHOI Library
  8. By: Haeckel, Ernst,
    Edition: 4. umgearb. und verm. aufl. ...
    Publication info: Leipzig, W. Engelmann, 1891
    Holding Institution: Boston Public Library (archive.org)
  9. By: Haeckel, Ernst,
    Publication info: Berlin, G. Reimer, 1876
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
  10. By: Bardeleben, Karl Heinrich von, - Haeckel, Ernst,
    Publication info: London, Rebman limited; New York, Rebman company, 1906
    Holding Institution: University of California Libraries (archive.org)
  11. By: Haeckel, Ernst,
    Publication info: Bonn, E. Strauss, 1901
    Holding Institution: University of California Libraries (archive.org)
  12. By: Haeckel, Ernst, - Thomson, J. Arthur (John Arthur), - Weismann, August, - Brett, George Sidney,
    Publication info: New York, Boni and Liveright, [1917]
    Holding Institution: University of Toronto - Thomas Fisher Rare Book Library
  13. By: Haeckel, Ernst,
    Publication info: New York, D. Appleton and company, 1897
    Holding Institution: University of California Libraries (archive.org)
  14. By: Haeckel, Ernst,
    Edition: 3d ed.
    Publication info: New York, D. Appleton, 1879
    Holding Institution: Princeton Theological Seminary Library (archive.org)
  15. By: Haeckel, Ernst,
    Publication info: London, C. K. Paul & co, 1879
    Holding Institution: Cornell University Library
  16. By: Haeckel, Ernst,
    Publication info: New York, Fowle, [1896]
    Holding Institution: Smithsonian Libraries
  17. By: Haeckel, Ernst,
    Publication info: New York, Putnam, 1910
    Holding Institution: Princeton Theological Seminary Library (archive.org)
  18. By: Haeckel, Ernst,
    Publication info: New York, Appleton, 1879
    Holding Institution: MBLWHOI Library
  19. By: Haeckel, Ernst,
    Edition: [3rd ed.]
    Publication info: Akron, Ohio, Werner Co, [1876]
    Holding Institution: MBLWHOI Library
  20. By: Haeckel, Ernst,
    Publication info: New York, D. Appleton and Co, 1897
    Holding Institution: MBLWHOI Library
  21. By: Haeckel, Ernst,
    Publication info: New York, D. Appleton, 1879
    Holding Institution: University of Toronto - Robarts Library
  22. By: Haeckel, Ernst,
    Publication info: New York, D. Appleton and company, 1898
    Holding Institution: University of California Libraries (archive.org)
  23. By: Haeckel, Ernst,
    Publication info: London, Kegan Paul, Trench & Co, 1883
    Holding Institution: University of California Libraries (archive.org)
  24. By: Haeckel, Ernst, - McCabe, Joseph,
    Publication info: New York, P. Eckler, publisher, [1906]
    Holding Institution: Internet Archive
  25. By: Haeckel, Ernst, - McCabe, Joseph, - McCabe, Joseph,
    Publication info: New York, G. P. Putnam, 1905
    Holding Institution: NCSU Libraries (archive.org)
  26. By: Haeckel, Ernst, - Haeckel, Ernst,
    Publication info: Leipzig, W. Engelmann, 1865
    Holding Institution: MBLWHOI Library
  27. By: Haeckel, Ernst,
    Publication info: New York, D. Appleton and company, 1879
    Holding Institution: Boston College Libraries (archive.org)
  28. By: Haeckel, Ernst,
    Publication info: London, Paul, 1879
    Holding Institution: University of Toronto - Robarts Library
  29. By: Haeckel, Ernst, - Royal College of Physicians of London.
    Publication info: Berlin, Georg Reimer, 1866
    Holding Institution: Royal College of Physicians, London (archive.org)
  30. By: Haeckel, Ernst, - Royal College of Physicians of London.
    Publication info: Berlin, Georg Reimer, 1866
    Holding Institution: Royal College of Physicians, London (archive.org)
  31. By: Haeckel, Ernst,
    Publication info: Berlin, G. Reimer, 1866
    Holding Institution: MBLWHOI Library
    BHL Collections: Charles Darwin's Library
  32. By: Haeckel, Ernst, - Letourneau, Ch. (Charles), - Martins, Charles,
    Publication info: Paris C. Reinwald et cie 1874
    Holding Institution: National Library of Medicine (archive.org)
  33. By: Haeckel, Ernst, - Lankester, E. Ray (Edwin Ray), Sir,
    Publication info: New York, D. Appleton and Company, 1880
    Holding Institution: MBLWHOI Library
  34. By: Haeckel, Ernst,
    Publication info: New York, D. Appleton, 1876
    Holding Institution: University of Toronto - Gerstein Science Information Centre
  35. By: Haeckel, Ernst, - Lankester, E. Ray (Edwin Ray), Sir,
    Publication info: London, Henry S. King, 1876
    Holding Institution: Natural History Museum Library, London
    BHL Collections: Charles Darwin's Library
  36. By: Haeckel, Ernst,
    Publication info: Berlin, Verlag von Gebrüder Paetel, 1883
    Holding Institution: University of California Libraries (archive.org)
  37. By: Haeckel, Ernst,
    Publication info: Berlin, G. Reimer, 1872
    Holding Institution: Smithsonian Libraries
    BHL Collections: Charles Darwin's Library
  38. By: Haeckel, Ernst,
    Publication info: Berlin, G. Reimer, 1872
    Holding Institution: American Museum of Natural History Library
  39. By: Haeckel, Ernst, - Bibliographisches Institut Leipzig.
    Publication info: Leipzig und Wien, Verlag des Bibliographischen Instituts, 1904
    Holding Institution: University Library, University of Illinois Urbana Champaign
    BHL Collections: Blog Features | Top BHL Partner Content
  40. By: Haeckel, Ernst, - Bibliographisches Institut Leipzig.
    Publication info: Leipzig und Wien, Verlag des Bibliographischen Instituts, 1904
    Holding Institution: University Library, University of North Carolina at Chapel Hill (archive.org)
  41. By: Haeckel, Ernst, - Bibliographisches Institut Leipzig.
    Publication info: Leipzig und Wien, Verlag des Bibliographischen Instituts, 1899-1904
    Holding Institution: Smithsonian Libraries
    BHL Collections: Under the Sea: World Oceans Day
  42. By: Haeckel, Ernst, - Challenger Expedition (1872-1876)
    Publication info: Jena, G. Fischer, 1879-1881
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
  43. By: Haeckel, Ernst,
    Publication info: Berlin, 1868
    Holding Institution: Natural History Museum Library, London
    BHL Collections: Charles Darwin's Library
  44. By: Haeckel, Ernst, - Neumann, Carl W.
    Publication info: Leipzig, Reclam, [pref. 1912]
    Holding Institution: MBLWHOI Library
  45. By: Haeckel, Ernst, - Haeckel, Ernst,
    Edition: 9., umgearb. und vermehrte Aufl.
    Publication info: Berlin, Georg Reimer, 1898
    Holding Institution: Naturalis Biodiversity Center
  46. By: Haeckel, Ernst,
    Edition: 8. umgearb. und verm. aufl.
    Publication info: Berlin, George Reimer, 1889
    Holding Institution: MBLWHOI Library
  47. By: Haeckel, Ernst,
    Edition: 4. verb. Aufl. mit 16 Tafeln, 10 Holzschnitten, 18 Stammbäumen und 19 systematischen Tabellen.
    Publication info: Berlin, G. Reimer, 1873
    Holding Institution: MBLWHOI Library
  48. By: Haeckel, Ernst,
    Publication info: Jena, G. Fischer, 1890
    Holding Institution: University of Toronto - Gerstein Science Information Centre
  49. By: Haeckel, Ernst, - Field, George Wilton,
    Publication info: Washington, Govt. Print. Off, 1893
    Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library
    BHL Collections: New York Botanical Garden
  50. By: Haeckel, Ernst,
    Publication info: Berlin, G. Reimer, 1906
    Holding Institution: MBLWHOI Library
  51. By: Haeckel, Ernst,
    Publication info: Leipzig, E. Günther, 1878
    Holding Institution: University of Michigan (archive.org)
  52. By: Haeckel, Ernst,
    Publication info: Berlin, G. Reimer, 1862-1888
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
  53. By: Haeckel, Ernst, - McCabe, Joseph, - McCabe, Joseph,
    Publication info: London, Watts & Co, 1901
    Holding Institution: University of California Libraries (archive.org)
  54. By: Haeckel, Ernst,
    Publication info: Frankfurt a.M, Neuer Frankfurter Verlag, 1910
    Holding Institution: Columbia University Libraries (archive.org)
  55. By: Haeckel, Ernst,
    Publication info: Frankfurt a.M, Neuer Frankfurter Verlag, 1910
    Holding Institution: MBLWHOI Library
  56. By: Haeckel, Ernst,
    Publication info: Jena, Hermann Dufft, 1877
    Holding Institution: MBLWHOI Library
  57. By: Haeckel, Ernst,
    Publication info: Berlin, G. Reimer, 1895
    Holding Institution: Smithsonian Libraries
  58. By: Haeckel, Ernst,
    Publication info: Berlin, Georg Reimer, 1894-96
    Holding Institution: MBLWHOI Library
  59. By: Lang, Arnold, - Bernard, Henry Meyners, - Bernard, Matilda. - Haeckel, Ernst,
    Publication info: London, Macmillan and Co, 1891-96
    Holding Institution: Multiple institutions
  60. By: Haeckel, Ernst,
    Publication info: Berlin, G. Eichler, 1857
    Holding Institution: Smithsonian Libraries
  61. By: Schmidt, Heinrich, - Haeckel, Ernst,
    Publication info: Leipzig, Verlag Unesma G.m.b.H, 1914
    Holding Institution: MBLWHOI Library
  62. By: Haeckel, Ernst,
    Publication info: Leipzig, Kröner, 1909
    Holding Institution: MBLWHOI Library
  63. By: Haeckel, Ernst, - McCabe, Joseph, - McCabe, Joseph,
    Publication info: New York, Harper & brothers, 1905
    Holding Institution: Cornell University Library
  64. By: Haeckel, Ernst, - McCabe, Joseph, - McCabe, Joseph,
    Publication info: New York, Harper, 1905
    Holding Institution: NCSU Libraries (archive.org)
  65. By: Haeckel, Ernst,
    Publication info: Jena, H. Dufft, 1875
    Holding Institution: Francis A. Countway Library of Medicine (archive.org)
  1. By: Haeckel, Ernst,
    Type: Article
    In: The Annals and magazine of natural history; zoology, botany, and geology
    Volume: 5
    Series: 4
    Date: 1870
    Page Range: 1--13
    Publication Info: London Taylor and Francis, Ltd
  2. By: Haeckel, Ernst,
    Type: Article
    In: The Annals and magazine of natural history; zoology, botany, and geology
    Volume: 19
    Series: 3
    Date: 1867
    Page Range: 63--67
    Publication Info: London Taylor and Francis, Ltd
  3. By: Haeckel, Ernst,
    Type: Article
    In: The Annals and magazine of natural history; zoology, botany, and geology
    Volume: 5
    Series: 4
    Date: 1870
    Page Range: 107--120
    Publication Info: London Taylor and Francis, Ltd
  4. By: Haeckel, Ernst,
    Type: Article
    In: The Annals and magazine of natural history; zoology, botany, and geology
    Volume: 11
    Series: 4
    Date: 1873
    Page Range: 421--430
    Publication Info: London Taylor and Francis, Ltd
  5. By: Haeckel, Ernst,
    Type: Article
    In: The Annals and magazine of natural history; zoology, botany, and geology
    Volume: 15
    Series: 3
    Date: 1865
    Page Range: 437--444
    Publication Info: London Taylor and Francis, Ltd
  6. By: Haeckel, Ernst,
    Type: Article
    In: The Annals and magazine of natural history; zoology, botany, and geology
    Volume: 5
    Series: 4
    Date: 1870
    Page Range: 176--191
    Publication Info: London Taylor and Francis, Ltd
  7. By: Haeckel, Ernst,
    Type: Article
    In: The Annals and magazine of natural history; zoology, botany, and geology
    Volume: 11
    Series: 4
    Date: 1873
    Page Range: 241--262
    Publication Info: London Taylor and Francis, Ltd