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  1. By: Emison, W B - Bilney, Roger J.
    Type: Article
    In: Raptor research
    Volume: 16
    Issue: 2
    Date: 1982
    Page Range: 54--58
    Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]
  2. By: Peel, B - Bilney, Roger J. - Bilney, Rohan J.
    Type: Article
    In: The Victorian Naturalist
    Volume: 122
    Date: 2005
    Page Range: 189--200
    Publication Info: [Melbourne] Field Naturalists Club of Victoria