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  1. By: Chubbs, Tony E. - Mactavish, Bruce - Oram, Keith - Trimper, Perry G.
    Type: Article
    In: The journal of raptor research
    Volume: 34
    Issue: 1
    Date: 2000
    Page Range: 56--57
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  2. By: Chubbs, Tony E. - Mactavish, Bruce - Oram, Keith - Trimper, Perry G. - Knox, Kathy - Goudie, R. Ian
    Type: Article
    In: The Canadian field-naturalist
    Volume: 115
    Issue: 1
    Date: 2001
    Page Range: 177--179
    Publication Info: Ottawa Ottawa Field-Naturalists' Club