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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Ellis, K L
    Type: Article
    In: Raptor research
    Volume: 20
    Issue: 3-4
    Date: 1986
    Page Range: 132--133
    Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]
  2. By: Fischer, David L. - Ellis, K L - Meese, R J
    Type: Article
    In: Raptor research
    Volume: 18
    Issue: 3
    Date: 1984
    Page Range: 98--102
    Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]