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  1. By: Medem, Federico
    Publication info: [Chicago], Chicago Natural History Museum, 1958
    Holding Institution: University Library, University of Illinois Urbana Champaign
  2. By: Medem, Federico
    Publication info: Chicago, Ill, Chicago Natural History Museum, 1955
    Holding Institution: University Library, University of Illinois Urbana Champaign
  1. By: Medem, Federico
    Type: Article
    In: Fieldiana
    Volume: 39
    Date: 1958
    Page Range: 227--247
    Publication Info: [Chicago] Chicago Natural History Museum [1945?-
  2. By: Zangerl, Rainer, - Medem, Federico
    Type: Article
    In: Bulletin of the Museum of Comparative Zoology at Harvard College
    Volume: 119
    Date: 1958
    Page Range: 373--390
    Publication Info: Cambridge, Mass The Museum 1863-