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  1. By: Kubisiak, John F. - Paisley, R. Neal - Wright, Robert G.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 111
    Issue: 3
    Date: 1997
    Page Range: 417--421
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Farquhar, Charles Craig - Clark, William S. - Wright, Robert G. - Coello, M
    Type: Article
    In: The journal of raptor research
    Volume: 28
    Issue: 4
    Date: 1994
    Page Range: 274--275
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-