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  1. By: Donkor, Noble T. - Okello, Moses M. - Hudson, Robert J. - Bork, Edward W.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 117
    Issue: 2
    Date: 2003-04-01
    Page Range: 196--202
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Kuzyk, Gerald W. - Hudson, Robert J.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 122
    Issue: 2
    Date: 2008-04-01
    Page Range: 179--181
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Kuzyk, Gerald W. - Hudson, Robert J.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 121
    Issue: 3
    Date: 2007-07-01
    Page Range: 299--302
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  4. By: Morgantini, Luigi E. - Hudson, Robert J.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 102
    Issue: 1
    Date: 1988
    Page Range: 12--19
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  5. By: Morgantini, Luigi E. - Hudson, Robert J.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 95
    Issue: 1
    Date: 1981
    Page Range: 69--74
    Publication Info: Ottawa Ottawa Field-Naturalists' Club