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  1. By: Billings, John S. (John Shaw), - Bergey, D. H. (David Hendricks), - Mitchell, S. Weir (Silas Weir),
    Publication info: Washington,Smithsonian Institution,1895.
    Holding Institution: Columbia University Libraries (archive.org)
  2. By: Mitchell, S. Weir (Silas Weir),
    Holding Institution: Missouri Botanical Garden, Peter H. Raven Library
    BHL Collections: Engelmann Papers, Missouri Botanical Garden
  3. By: Mitchell, S. Weir (Silas Weir),
    Publication info: New York :Moorhead, Simpson & Bond,1868.
    Holding Institution: Francis A. Countway Library of Medicine (archive.org)
  4. By: Mitchell, S. Weir (Silas Weir),
    Publication info: [Philadelphia],1868.
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
  5. By: Mitchell, S. Weir (Silas Weir),
    Publication info: Washington :Smithsonian Institution,1860
    Holding Institution: Columbia University Libraries (archive.org)
  6. By: Mitchell, S. Weir (Silas Weir), - Reichert, Edward Tyson,
    Publication info: Washington :Published by the Smithsonian Institution,1896.
    Holding Institution: University of California Libraries (archive.org)