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  1. By: Hanson, Philip
    Type: Article
    In: Field Museum of Natural History bulletin
    Volume: 51
    Issue: 5
    Date: 1980
    Page Range: 12--13
    Publication Info: [Chicago, Ill.], The Museum, [1972]-©1990
  2. By: Hanson, Philip
    Type: Article
    In: Field Museum of Natural History bulletin
    Volume: 48
    Issue: 7
    Date: 1977
    Page Range: 10--17
    Publication Info: [Chicago, Ill.], The Museum, [1972]-©1990