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  1. By: Bang, Miguel, - Berlandier, Jean-Louis, - Botteri, Mateo, - Fendler, Augustus, - Forwood, W. H. (William Henry), - Heller, Amos Arthur, - Northrop, Alice Rich, - Northrop, John Isaiah, - Palmer, Edward, - Parry, C. C. (Charles Christopher), - Rusby, Henry Hurd, - Schaffner, José Guillermo, - Seaton, H. E. (Henry Eliason), - Tonduz, Adolfo, - Wright, Charles. - Harvard University. Gray Herbarium.
    Publication info: [1856-1898]
    Holding Institution: Harvard University Botany Libraries
  2. By: Northrop, Alice Rich, - Northrop, John Isaiah,
    Publication info: New York, Torrey Botanical Club, 1902
    Holding Institution: Wellesley College Library
  3. By: Osborn, Henry Fairfield, - Northrop, John Isaiah,
    Publication info: New York, Columbia University Press, [c1910]
    Holding Institution: Cornell University Library
  4. By: Osborn, Henry Fairfield, - Northrop, John Isaiah,
    Publication info: New York Columbia University Press 1910
    Holding Institution: University of Toronto - Gerstein Science Information Centre
  5. By: Osborn, Henry Fairfield, - Northrop, John Isaiah,
    Publication info: New York, Columbia University Press, 1910
    Holding Institution: Multiple institutions
  1. By: Northrop, John Isaiah,
    Type: Article
    In: The Auk
    Volume: 8
    Date: 1891
    Page Range: 64--80
    Publication Info: Washington, D.C, American Ornithologists' Union, etc, 1884-
  2. By: Northrop, John Isaiah,
    Type: Article
    In: Torreya
    Volume: 1
    Issue: 12
    Date: 1901
    Page Range: 141--142
    Publication Info: Burlington, Vt, Torrey Botanical Club, 1901-1945
  3. By: Northrop, John Isaiah, - Northrop, Alice Rich,
    Type: List
    In: Gray Herbarium miscellaneous plant lists
    Date: 1856-1898
    Publication Info: [1856-1898]