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  1. By: Suydam, Robert S. - Quakenbush, Lori T - Dickson, D. Lynne - Obritschkewitsch, Tim
    Type: Article
    In: The Canadian field-naturalist
    Volume: 114
    Issue: 3
    Date: 2000
    Page Range: 444--452
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Suydam, Robert S. - George, John Craighead
    Type: Article
    In: The Canadian field-naturalist
    Volume: 106
    Issue: 4
    Date: 1992
    Page Range: 489--492
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Ritchie, Robert J - Burgess, Robert M. - Suydam, Robert S.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 114
    Issue: 3
    Date: 2000
    Page Range: 395--404
    Publication Info: Ottawa Ottawa Field-Naturalists' Club