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  1. By: Niemi, G J - Hanowski, J M
    Type: Article
    In: The journal of raptor research
    Volume: 31
    Issue: 2
    Date: 1997
    Page Range: 191--196
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  2. By: Niemi, G J - Hanowski, J M
    Type: Article
    In: The journal of raptor research
    Volume: 31
    Issue: 2
    Date: 1997
    Page Range: 93--94
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-