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  1. By: Volkman, Nicholas J - Trivelpiece, Wayne
    Type: Article
    In: The Wilson bulletin
    Volume: 93
    Issue: 2
    Date: 1981
    Page Range: 243--248
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Emslie, Steven D. - Karnovsky, Nina - Trivelpiece, Wayne
    Type: Article
    In: The Wilson bulletin
    Volume: 107
    Issue: 2
    Date: 1995
    Page Range: 317--327
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-