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