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  1. First supplement to the Orchids of Peru /
    By: Schweinfurth, Charles,
    Publication info: Chicago :Field Museum of Natural History,[1970]
    Holding Institution: University Library, University of Illinois Urbana Champaign
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  2. Orchids of Peru /
    By: Schweinfurth, Charles, - Chicago Natural History Museum.
    Publication info: Chicago, Ill. :Chicago Natural History Museum,1961.
    Holding Institution: University Library, University of Illinois Urbana Champaign
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  3. Orchids of Peru /
    By: Schweinfurth, Charles, - Chicago Natural History Museum.
    Publication info: Chicago, Ill. :Chicago Natural History Museum,1958.
    Holding Institution: University Library, University of Illinois Urbana Champaign
    View Book
  4. Orchids of Peru /
    By: Schweinfurth, Charles, - Chicago Natural History Museum.
    Publication info: Chicago, Ill. :Chicago Natural History Museum,1959.
    Holding Institution: University Library, University of Illinois Urbana Champaign
    View Book