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  1. Commerce of the prairies :or, the journal of a Santa Fé trader, during eight expeditions across the great western prairies, and a residence of nearly nine years in northern Mexico.
    By: Gregg, Josiah,
    Publication info: New York :H. G. Langley,1844.
    Contributed by: Missouri Botanical Garden, Peter H. Raven Library
    BHL Collections: Engelmann Herbarium
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  2. Correspondence : Gregg (Josiah) and Engelmann (George), 1846-1849.
    By: Gregg, Josiah,
    Contributed by: Missouri Botanical Garden, Peter H. Raven Library
    BHL Collections: Engelmann Papers, Missouri Botanical Garden
    View Book