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  1. By: Dybas, Henry S.
    Publication info: [Chicago], Chicago Natural History Museum, 1955
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Porophila
  2. By: Dybas, Henry S.
    Publication info: Chicago, Chicago Natural History Museum, 1956
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Beetles  Oregon  Porophila