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  1. The herbarium of Josiah Gregg.
    By: Engelmann, George,
    Contributed by: Missouri Botanical Garden, Peter H. Raven Library
    Subjects: 1806-1850  1809-1884  Botanical specimens  Catalogs  Catalogs and collections  Engelmann, George,  Gregg, Josiah,  Herbarium  Mexico  North America  Plants  Travel  
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