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  1. By: Burhans, Dirk E ., - Thompson, Frank R
    Type: Article
    In: The Wilson bulletin
    Volume: 111
    Issue: 2
    Date: 1999
    Page Range: 210--215
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Furey, Maria A - Burhans, Dirk E .,
    Type: Article
    In: The Wilson journal of ornithology
    Volume: 118
    Issue: 3
    Date: 2006
    Page Range: 391--398
    Publication Info: Lawrence, KS, Wilson Ornithological Society, 2006-