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  1. By: Johnson, Steven L
    Type: Article
    In: The Wilson journal of ornithology
    Volume: 118
    Issue: 3
    Date: 2006
    Page Range: 341--352
    Publication Info: Lawrence, KS Wilson Ornithological Society 2006-
  2. By: Jones, Michael T. - Willey, Lisabeth L. - Yorks, Derek T. - Hazelton, Peter D. - Johnson, Steven L
    Type: Article
    In: The Canadian field-naturalist
    Volume: 134
    Issue: 1
    Date: 2020-03-01
    Page Range: 56--59
    Publication Info: Ottawa Ottawa Field-Naturalists' Club