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  1. By: Erichsen, A L - Smallwood, S - Ottum, N D - Fry, D. Michael
    Type: Article
    In: The journal of raptor research
    Volume: 28
    Issue: 1
    Date: 1994
    Page Range: 46--46
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-