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  1. By: Mundy, P J - Robertson, A S - Komen, Joris - O'connor, T G
    Type: Article
    In: Raptor research
    Volume: 20
    Issue: 2
    Date: 1986
    Page Range: 61--64
    Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]
  2. By: Robertson, A S
    Type: Article
    In: Raptor research
    Volume: 20
    Issue: 2
    Date: 1986
    Page Range: 51--60
    Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]