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  1. Michigan trees : a handbook of the native and most important introduced species / by Charles Herbert Otis ; with an introduction by George Plumer Burns.
    By: Otis, Charles Herbert,
    Edition: [4th ed., rev.]
    Publication info: Ann Arbor :Regents of the University of Michigan,1917 [c1915]
    Contributed by: University of California Libraries (archive.org)
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  2. Michigan trees; a handbook of the native and most important introduced species.
    By: Otis, Charles Herbert,
    Edition: [3d ed., rev.]
    Publication info: Ann Arbor,The Regents,[c1915]
    Contributed by: Cornell University Library
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  3. Michigan trees; a handbook of the native and most important introduced species, by Charles Herbert Otis, with an introduction by George Plumer Burns.
    By: Otis, Charles Herbert,
    Publication info: Ann Arbor,The Regents,1913.
    Contributed by: University of California Libraries (archive.org)
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  4. The trees of Vermont,
    By: Burns, George Plumer, - Otis, Charles Herbert,
    Publication info: BurlingeonFree press printing co.1916
    Contributed by: Robarts - University of Toronto (archive.org)
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