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  1. By: Powell, Richard J.,
    Type: Article
    In: Field Museum of Natural History bulletin
    Volume: 55
    Issue: 5
    Date: 1984
    Page Range: 3--25
    Publication Info: [Chicago, Ill.], The Museum, [1972]-©1990
  2. By: Powell, Richard J.,
    Type: Article
    In: Field Museum of Natural History bulletin
    Volume: 56
    Issue: 5
    Date: 1985
    Page Range: 5--26
    Publication Info: [Chicago, Ill.], The Museum, [1972]-©1990
  3. By: Powell, Richard J.,
    Type: Article
    In: Field Museum of Natural History bulletin
    Volume: 55
    Issue: 4
    Date: 1984
    Page Range: 11--18
    Publication Info: [Chicago, Ill.], The Museum, [1972]-©1990