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  1. By: Doepker, Robert V. - Earle, Richard D. - Ozoga, John J.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 106
    Issue: 3
    Date: 1992
    Page Range: 366--371
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Ozoga, John J. - Doepker, Robert V. - Earle, Richard D.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 106
    Issue: 3
    Date: 1992
    Page Range: 357--360
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Beyer, Dean E. - Roell, Brian J. - Hammill, James H. - Earle, Richard D.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 115
    Issue: 2
    Date: 2001
    Page Range: 234--240
    Publication Info: Ottawa Ottawa Field-Naturalists' Club