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  1. By: Pontynen, Arthur
    Type: Article
    In: Field Museum of Natural History bulletin
    Volume: 49
    Issue: 6
    Date: 1978
    Page Range: 16--22
    Publication Info: [Chicago, Ill.], The Museum, [1972]-©1990
  2. By: Pontynen, Arthur
    Type: Article
    In: Field Museum of Natural History bulletin
    Volume: 51
    Issue: 2
    Date: 1980
    Page Range: 6--9
    Publication Info: [Chicago, Ill.], The Museum, [1972]-©1990