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  1. By: Zeiller, R. (René),
    Publication info: S.l, s.n, 188-?
    Holding Institution: Smithsonian Libraries and Archives
    Subjects: 1809-1883  Biography  Heer, Oswald,  Paleobotanists  Paleontologists  Switzerland  
  2. By: Heer, Oswald,
    Holding Institution: Missouri Botanical Garden, Peter H. Raven Library
    Subjects: (Ernst Heinrich Friedrich),  1791-1858  1809-1883  1809-1884  Correspondence  Engelmann, George,  Heer, Oswald,  Letters  Malvaceae  Meyer, Ernst H. F  Receipts (Acknowledgments)
    BHL Collections: Engelmann Papers, Missouri Botanical Garden