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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, - 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)
  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,
    Edition: 3. umgearb. aufl.
    Publication info: Leipzig,W. Engelmann,1877.
    Holding Institution: MBLWHOI Library
  6. By: Haeckel, Ernst,
    Edition: 6. verb. Aufl.
    Publication info: Leipzig,W. Engelmann,1910.
    Holding Institution: Smithsonian Libraries
  7. By: Haeckel, Ernst,
    Edition: 4. umgearb. und verm. aufl. ...
    Publication info: Leipzig :W. Engelmann,1891.
    Holding Institution: Boston Public Library (archive.org)
  8. By: Haeckel, Ernst,
    Publication info: Berlin :G. Reimer,1876.
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
  9. 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)
  10. By: Haeckel, Ernst,
    Publication info: Bonn :E. Strauss,1901.
    Holding Institution: University of California Libraries (archive.org)
  11. By: Haeckel, Ernst,
    Edition: 3d ed.
    Publication info: New York :D. Appleton,1879.
    Holding Institution: Princeton Theological Seminary Library (archive.org)
  12. By: Haeckel, Ernst,
    Publication info: New York :Appleton,1879.
    Holding Institution: MBLWHOI 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,
    Publication info: New York,Fowle[1896]
    Holding Institution: Smithsonian Libraries
  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 :D. Appleton and company,1898.
    Holding Institution: University of California Libraries (archive.org)
  17. By: Haeckel, Ernst,
    Publication info: London :Kegan Paul, Trench & Co.,1883.
    Holding Institution: University of California Libraries (archive.org)
  18. By: Haeckel, Ernst,
    Edition: [3rd ed.]
    Publication info: Akron, Ohio :Werner Co.,[1876]
    Holding Institution: MBLWHOI Library
  19. By: Haeckel, Ernst,
    Publication info: New York,D. Appleton and Co.,1897.
    Holding Institution: MBLWHOI Library
  20. By: Haeckel, Ernst,
    Publication info: New YorkD. Appleton1879
    Holding Institution: University of Toronto - Robarts Library
  21. By: Haeckel, Ernst, - McCabe, Joseph,
    Publication info: New York,P. Eckler, publisher,[1906]
    Holding Institution: Internet Archive
  22. By: Haeckel, Ernst, - McCabe, Joseph,
    Publication info: New York,G. P. Putnam,1905.
    Holding Institution: NCSU Libraries (archive.org)
  23. By: Haeckel, Ernst,
    Publication info: Leipzig,W. Engelmann,1865.
    Holding Institution: MBLWHOI Library
  24. By: Haeckel, Ernst,
    Publication info: New York,D. Appleton and company,1879.
    Holding Institution: Boston College Libraries (archive.org)
  25. By: Haeckel, Ernst,
    Publication info: London,Paul,1879.
    Holding Institution: University of Toronto - Robarts Library
  26. By: Haeckel, Ernst, - Royal College of Physicians of London.
    Publication info: Berlin :Georg Reimer,1866.
    Holding Institution: Royal College of Physicians, London (archive.org)
  27. By: Haeckel, Ernst, - Royal College of Physicians of London.
    Publication info: Berlin :Georg Reimer,1866.
    Holding Institution: Royal College of Physicians, London (archive.org)
  28. By: Haeckel, Ernst,
    Publication info: Berlin,G. Reimer,1866.
    Holding Institution: MBLWHOI Library
    BHL Collections: Charles Darwin's Library
  29. By: Haeckel, Ernst, - Lankester, E. Ray (Edwin Ray), Sir,
    Publication info: New York :D. Appleton and Company,1880.
    Holding Institution: MBLWHOI Library
  30. 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
  31. By: Haeckel, Ernst,
    Publication info: New York :D. Appleton,1876.
    Holding Institution: University of Toronto - Gerstein Science Information Centre
  32. By: Haeckel, Ernst,
    Publication info: Berlin :Verlag von Gebrüder Paetel,1883.
    Holding Institution: University of California Libraries (archive.org)
  33. By: Haeckel, Ernst,
    Publication info: Berlin,G. Reimer,1872.
    Holding Institution: Smithsonian Libraries
    BHL Collections: Charles Darwin's Library
  34. By: Haeckel, Ernst,
    Publication info: Berlin,G. Reimer,1872.
    Holding Institution: American Museum of Natural History Library
  35. By: Haeckel, Ernst, - Bibliographisches Institut (Leipzig, Germany)
    Publication info: Leipzig und Wien :Verlag des Bibliographischen Instituts,1899-1904.
    Holding Institution: Smithsonian Libraries
    BHL Collections: Under the Sea: World Oceans Day
  36. 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)
  37. 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
  38. By: Haeckel, Ernst, - Challenger Expedition
    Publication info: Jena :G. Fischer,1879-1881.
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
  39. By: Haeckel, Ernst, - Neumann, Carl W.
    Publication info: Leipzig,Reclam[pref. 1912]
    Holding Institution: MBLWHOI Library
  40. By: Haeckel, Ernst (Ernst Heinrich Philipp August), - Haeckel, Ernst,
    Edition: 9., umgearb. und vermehrte Aufl.
    Publication info: Berlin :Georg Reimer,1898.
    Holding Institution: Naturalis Biodiversity Center
  41. By: Haeckel, Ernst,
    Edition: 8. umgearb. und verm. aufl.
    Publication info: Berlin :George Reimer,1889.
    Holding Institution: MBLWHOI Library
  42. By: Haeckel, Ernst,
    Publication info: Berlin,1868.
    Holding Institution: Natural History Museum Library, London
    BHL Collections: Charles Darwin's Library
  43. 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
  44. 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
  45. By: Haeckel, Ernst,
    Publication info: JenaG. Fischer1890
    Holding Institution: University of Toronto - Gerstein Science Information Centre
  46. By: Haeckel, Ernst,
    Publication info: Berlin,G. Reimer,1906.
    Holding Institution: MBLWHOI Library
  47. By: Haeckel, Ernst,
    Publication info: Leipzig,E. Günther,1878.
    Holding Institution: University of Michigan (archive.org)
  48. By: Haeckel, Ernst,
    Publication info: Berlin :G. Reimer,1862-1888.
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
  49. By: Haeckel, Ernst, - McCabe, Joseph,
    Publication info: London :Watts & Co.,1901.
    Holding Institution: University of California Libraries (archive.org)
  50. By: Haeckel, Ernst,
    Publication info: Frankfurt a.M.,Neuer Frankfurter Verlag,1910.
    Holding Institution: Columbia University Libraries (archive.org)
  51. By: Haeckel, Ernst,
    Publication info: Frankfurt a.M.,Neuer Frankfurter Verlag,1910.
    Holding Institution: MBLWHOI Library
  52. By: Haeckel, Ernst,
    Publication info: Jena :Hermann Dufft,1877.
    Holding Institution: MBLWHOI Library
  53. By: Haeckel, Ernst,
    Publication info: Berlin :G. Reimer,1895.
    Holding Institution: Smithsonian Libraries
  54. By: Haeckel, Ernst,
    Publication info: Berlin :Georg Reimer,1894-96.
    Holding Institution: MBLWHOI Library
  55. By: Lang, Arnold, - Bernard, Henry Meyners. - Bernard, Matilda. - Haeckel, Ernst,
    Publication info: London,Macmillan,1891-96.
    Holding Institution: Cornell University Library
  56. By: Lang, Arnold, - Bernard, Henry Meyners. - Bernard, Matilda, - Haeckel, Ernst,
    Publication info: New York,Macmillan,1891-96
    Holding Institution: University of California Libraries (archive.org)
  57. By: Lang, Arnold, - Bernard, Henry Meyners - Bernard, Matilda - Haeckel, Ernst,
    Publication info: London,Macmillan and Co.,1891-96.
    Holding Institution: Smithsonian Libraries
  58. By: Lang, Arnold, - Bernard, Henry Meyners. - Bernard, Matilda. - Haeckel, Ernst,
    Publication info: London,Macmillan and Co.,1891-96.
    Holding Institution: MBLWHOI Library
  59. By: Haeckel, Ernst,
    Publication info: Berlin,G. Eichler,1857
    Holding Institution: Smithsonian Libraries
  60. By: Schmidt, Heinrich, - Haeckel, Ernst,
    Publication info: Leipzig,Verlag Unesma G.m.b.H.,1914.
    Holding Institution: MBLWHOI Library
  61. By: Haeckel, Ernst,
    Publication info: Leipzig,Kröner,1909.
    Holding Institution: MBLWHOI Library
  62. By: Haeckel, Ernst, - McCabe, Joseph,
    Publication info: London,Harper & brothers,1905.
    Holding Institution: Cornell University Library
  63. By: Haeckel, Ernst, - McCabe, Joseph,
    Publication info: New York,Harper,1905.
    Holding Institution: NCSU Libraries (archive.org)
  64. 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: 5
    Series: 4
    Date: 1870
    Page Range: 107--120
    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: 11
    Series: 4
    Date: 1873
    Page Range: 421--430
    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: 15
    Series: 3
    Date: 1865
    Page Range: 437--444
    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: 5
    Series: 4
    Date: 1870
    Page Range: 176--191
    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: 11
    Series: 4
    Date: 1873
    Page Range: 241--262
    Publication info: London,Taylor and Francis, Ltd.