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  1. By: Clum, N J - Fitzpatrick, Marianne P. - Dierenfeld, E S
    Type: Article
    In: The journal of raptor research
    Volume: 31
    Issue: 3
    Date: 1997
    Page Range: 267--272
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-