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  1. By: Birkhead, Tim, - Nettleship, David N.
    Type: Article
    In: The Wilson bulletin
    Volume: 107
    Issue: 3
    Date: 1995
    Page Range: 397--412
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Birkhead, Tim, - Nettleship, David N.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 102
    Issue: 1
    Date: 1988
    Page Range: 20--24
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Birkhead, Tim, - Johnson, S. D. - Nettleship, David N.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 100
    Issue: 1
    Date: 1986
    Page Range: 115--117
    Publication Info: Ottawa Ottawa Field-Naturalists' Club