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  1. By: Ballard, Warren B - Ayres, Lee Anne - Gardner, C. L. - Foster, J. W.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 105
    Issue: 4
    Date: 1991
    Page Range: 497--504
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Johnson, Oscar W., - Adler, Corey D - Ayres, Lee Anne - Bishop, Mary Anne - Doster, Jodi E - Johnson, Patricia M - Kienholz, Ronald J - Savage, Susan,
    Type: Article
    In: The Wilson bulletin
    Volume: 116
    Issue: 2
    Date: 2004
    Page Range: 158--162
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-