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  1. Correspondence : Rothrock and Engelmann,
    By: Rothrock, Joseph T., - Engelmann, George,
    Contributed by: Missouri Botanical Garden, Peter H. Raven Library
    Subjects: (George Montague),  1809-1884  1826-1892  1839-1922  1842-1905  1871-1873  Botanical specimens  Botany  Correspondence  Engelmann, George,  Plant collecting  Plants  Rothrock, Joseph T.,  Southwest, New  Surveys  United States  Watson, Sereno,  West (U.S.)  Wheeler, George M  
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