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  1. By: Gray, Asa, - Holm, Theodor (Herman Theodor), - Holmes, Oliver Wendell, - Holton, Isaac F. (Isaac Farwell) - Holzinger, J. M. (John Michael), - Hooper, Edward William, - Horsford, Frederick Hinsdale, - Howell, Joseph, - Howell, Thomas, - Humphreys, A. A. - Hunnewell, Horatio Hollis, - Hunt, Thomas Sterry, - Hunter, C.L.,
    Publication info: [1837-1903]
    Holding Institution: Harvard University Botany Libraries
  2. By: Holton, Isaac F. (Isaac Farwell)
    Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library
    BHL Collections: John Torrey Papers
  1. By: Holton, Isaac F. (Isaac Farwell)
    Type: Correspondence
    In: Asa Gray correspondence. Senders Ho-Hy
    Date: 1857-04-18
    Publication Info: [1837-1903]
  2. By: Holton, Isaac F. (Isaac Farwell)
    Type: Correspondence
    In: Asa Gray correspondence. Senders Ho-Hy
    Date: 1852-02-02
    Publication Info: [1837-1903]
  3. By: Holton, Isaac F. (Isaac Farwell)
    Type: Correspondence
    In: Asa Gray correspondence. Senders Ho-Hy
    Date: 1856-02-09
    Publication Info: [1837-1903]
  4. By: Holton, Isaac F. (Isaac Farwell)
    Type: Correspondence
    In: Asa Gray correspondence. Senders Ho-Hy
    Date: 1857-01-16
    Publication Info: [1837-1903]
  5. By: Holton, Isaac F. (Isaac Farwell)
    Type: Correspondence
    In: Asa Gray correspondence. Senders Ho-Hy
    Date: 1848-03-30
    Publication Info: [1837-1903]
  6. By: Torrey, John, - Holton, Isaac F. (Isaac Farwell)
    Type: Correspondence
    In: John Torrey letters
    Date: 1851-11-04
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