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  1. By: Mueller, Robert Francis, - Olsen, Edward John,
    Publication info: [Chicago], Field Museum of Natural History, 1969
    Holding Institution: University Library, University of Illinois Urbana Champaign
  1. By: Mueller, Robert Francis,
    Type: Article
    In: Bulletin
    Volume: 38
    Issue: 1
    Date: 1967
    Page Range: 4--7
    Publication Info: [Chicago], The Museum, 1966-1972