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  1. By: Kerr, Kenneth D. - Peterson, William J.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 102
    Issue: 3
    Date: 1988
    Page Range: 552--553
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Nicholson, Kerry L. - Peterson, William J. - Ballard, Warren B
    Type: Article
    In: The Canadian field-naturalist
    Volume: 122
    Issue: 3
    Date: 2008-07-01
    Page Range: 253--261
    Publication Info: Ottawa Ottawa Field-Naturalists' Club