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  1. By: Watson, Sereno, - Eaton, Daniel Cady, - United States Geological Exploration of the Fortieth Parallel
    Publication info: Washington, Govt. Print. Off, 1871
    Holding Institution: Cornell University Library
  2. By: Bailey, William Whitman, - United States Geological Exploration of the Fortieth Parallel
    Publication info: [1867-1868]
    Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library
  3. By: Watson, Sereno, - Engelmann, George, - United States Geological Exploration of the Fortieth Parallel
    Publication info: Washington, D.C, United States Geological Exploration of the 40th paralled, 1871
    Holding Institution: Missouri Botanical Garden, Peter H. Raven Library
    BHL Collections: Engelmann Herbarium
  4. By: Marsh, Othniel Charles, - United States. Army. Corps of Engineers. - United States Geological Exploration of the Fortieth Parallel
    Publication info: Washington, G.P.O, 1880
    Holding Institution: Wellesley College Library
    BHL Collections: Unearthed! Smithsonian Libraries' Paleo Collection
  5. By: Watson, Sereno, - United States Geological Exploration of the Fortieth Parallel
    Holding Institution: Harvard University Botany Libraries
    BHL Collections: BHL Field Notes Project
  6. By: United States Geological Exploration of the Fortieth Parallel - Bien, Julius, - Eaton, Daniel Cady, - Emmons, Samuel Franklin, - Hague, A. (Arnold), - Hague, James D. (James Duncan), - Hall, James, - King, Clarence, - Meek, F. B. (Fielding Bradford), - Ridgway, Robert, - Watson, Sereno, - Whitfield, R. P. (Robert Parr), - Whitfield, R. P. (Robert Parr),
    Publication info: Washington, D.C, G.P.O, 1870-80
    Holding Institution: Multiple institutions