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  1. Descriptions of plants collected by William Gambel, M.D., in the Rocky Mountains and Upper California /by Thomas Nuttall.
    By: Nuttall, Thomas, - Gambel, William,
    Publication info: Philadelphia :The Academy of Natural Sciences of Philadelphia,1848?
    Contributed by: Missouri Botanical Garden, Peter H. Raven Library
    BHL Collections: Engelmann Herbarium
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