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  1. By: Sprague, Isaac, - Hervey, A. B. (Alpheus Baker),
    Publication info: Boston, S. E. Cassino, 1882
    Holding Institution: Wellesley College Library (archive.org)
  2. By: Sprague, Isaac, - Hervey, A. B. (Alpheus Baker), - Nims & Knight,
    Publication info: Troy, N.Y, Nims and Knight, 1887
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Sprague, Isaac, - Hervey, A. B. (Alpheus Baker),
    Publication info: Boston, Estes & Lauriat, 1882
    Holding Institution: Canadiana.org (archive.org)
  4. By: Sprague, Isaac, - Schott, Arthur,
    Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library
    BHL Collections: New York Botanical Garden
  5. By: Sprague, Isaac,
    Publication info: Boston, S.E. Cassino, 1882
    Holding Institution: University of Toronto - Gerstein Science Information Centre
  6. By: Sprague, Isaac, - Hervey, A. B. (Alpheus Baker),
    Publication info: Boston, L.C. Page, 1899
    Holding Institution: Canadiana.org (archive.org)
  7. By: Sprague, Isaac, - Hervey, A. B. (Alpheus Baker),
    Publication info: Troy, N.Y, Nims and Knight, 1888, c1885
    Holding Institution: Canadiana.org (archive.org)
  8. By: Gray, Asa, - Sprague, Isaac,
    Publication info: Boston, J. Munroe and Co, 1848-49
    Holding Institution: University Library, University of Illinois Urbana Champaign
  9. By: Gray, Asa, - Sprague, Isaac,
    Publication info: New-York, G. P. Putnam, 1849
    Holding Institution: Wellesley College Library (archive.org)
  10. By: Gray, Asa, - Sprague, Isaac,
    Publication info: New York, Ivison, Blakeman, Taylor & Co, 1881
    Holding Institution: Wellesley College Library (archive.org)
  11. By: Gray, Asa, - Sprague, Isaac, - Smithsonian Institution
    Publication info: Washington, Smithsonian Institution, 1891
    Holding Institution: Smithsonian Libraries
  12. By: Hervey, A. B. (Alpheus Baker), - Sprague, Isaac,
    Publication info: Boston, L. C. Page and Company (Inc.), 1899
    Holding Institution: Cornell University Library
  1. By: Sprague, Isaac,
    Type: Correspondence
    In: Asa Gray correspondence
    Date: 1890-01-26
    Publication Info: [1847-1891]