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  1. By: Orr, Craig D - Parsons, John L.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 96
    Issue: 3
    Date: 1982
    Page Range: 323--328
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Orr, Craig D - Ward, Richard M. P. - Williams, Norman A - Brown, R. G. B. (Richard George Bolney),
    Type: Article
    In: The Wilson bulletin
    Volume: 94
    Issue: 3
    Date: 1982
    Page Range: 303--312
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  3. By: Orr, Craig D - Gillis, David J. - Valdron, Linda G.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 94
    Issue: 2
    Date: 1980
    Page Range: 185--187
    Publication Info: Ottawa Ottawa Field-Naturalists' Club