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  1. By: Gray, Asa, - Ward, Lester F. (Lester Frank), - Webb, Philip Barker, - Wedgwood, Julia, - Weigel, Felix Oswald, - Weigel, T. O. (Theodor Oswald), - T. O. Weigel (Firm), - B. Westermann & Co.,
    Publication info: [1839-1896]
    Holding Institution: Harvard University Botany Libraries
  2. By: Weigel, T. O. (Theodor Oswald),
    Holding Institution: Missouri Botanical Garden, Peter H. Raven Library
    BHL Collections: Engelmann Papers, Missouri Botanical Garden
  3. By: Martius, Karl Friedrich Philipp von, - Mohl, Hugo von, - Unger, F. (Franz), - Bauer, Ferdinand, - Weigel, T. O. (Theodor Oswald),
    Publication info: Lipsiae: T.O. Weigel, [1823-50]
    Holding Institution: Missouri Botanical Garden, Peter H. Raven Library
    BHL Collections: Missouri Botanical Garden's Rare Books Collection
  4. By: Pohl, Johann Emanuel, - Häussle, J. - Sandler, Wilhelm. - Strauss, Antonii. - Weigel, T. O. (Theodor Oswald),
    Publication info: Vindobonae [Vienna] : Antonii Strauss, 1827-31.
    Holding Institution: Missouri Botanical Garden, Peter H. Raven Library
    BHL Collections: Missouri Botanical Garden's Rare Books Collection
  1. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1881-04-30
    Publication info: [1839-1896]
  2. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1874-04-08
    Publication info: [1839-1896]
  3. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1874-04-08
    Publication info: [1839-1896]
  4. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1881-08-13
    Publication info: [1839-1896]
  5. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1876-08-04
    Publication info: [1839-1896]
  6. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1887-12-10
    Publication info: [1839-1896]
  7. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1871-12-11
    Publication info: [1839-1896]
  8. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1871-12-17
    Publication info: [1839-1896]
  9. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1880-02-04
    Publication info: [1839-1896]
  10. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1877-02-09
    Publication info: [1839-1896]
  11. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1877-02-09
    Publication info: [1839-1896]
  12. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1870-07-15
    Publication info: [1839-1896]
  13. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1880-07-19
    Publication info: [1839-1896]
  14. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1879-07-28
    Publication info: [1839-1896]
  15. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1882-07-03
    Publication info: [1839-1896]
  16. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1873-07-07
    Publication info: [1839-1896]
  17. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1873-07-07
    Publication info: [1839-1896]
  18. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1875-06-18
    Publication info: [1839-1896]
  19. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1876-06-02
    Publication info: [1839-1896]
  20. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1878-06-29
    Publication info: [1839-1896]
  21. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1887-06-04
    Publication info: [1839-1896]
  22. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1878-03-15
    Publication info: [1839-1896]
  23. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1870-03-16
    Publication info: [1839-1896]
  24. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1872-03-25
    Publication info: [1839-1896]
  25. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1873-03-04
    Publication info: [1839-1896]
  26. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1873-03-05
    Publication info: [1839-1896]
  27. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1872-03-09
    Publication info: [1839-1896]
  28. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1878-05-01
    Publication info: [1839-1896]
  29. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1879-05-13
    Publication info: [1839-1896]
  30. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1879-05-14
    Publication info: [1839-1896]
  31. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1877-11-08
    Publication info: [1839-1896]
  32. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1878-10-14
    Publication info: [1839-1896]
  33. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1878-10-14
    Publication info: [1839-1896]
  34. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1873-10-20
    Publication info: [1839-1896]
  35. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1882-09-28
    Publication info: [1839-1896]
  36. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1879-09-06
    Publication info: [1839-1896]
  37. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1882-09-07
    Publication info: [1839-1896]
  38. By: Weigel, T. O. (Theodor Oswald),
    Type: Correspondence
    In: Asa Gray correspondence.
    Date: 1839-1896
    Publication info: [1839-1896]