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  1. By: Laybourne, Roxie C. - Deedrick, Douglas W - Hueber, Francis M
    Type: Article
    In: The Wilson bulletin
    Volume: 106
    Issue: 1
    Date: 1994
    Page Range: 18--25
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Sabo, Beth Ann - Laybourne, Roxie C.
    Type: Article
    In: The journal of raptor research
    Volume: 28
    Issue: 3
    Date: 1994
    Page Range: 192--193
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-