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  1. By: Lewis, Richard A - Degner, Mark A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 96
    Issue: 2
    Date: 1982
    Page Range: 218--219
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Lewis, Richard A
    Type: Article
    In: The Wilson bulletin
    Volume: 97
    Issue: 1
    Date: 1985
    Page Range: 97--101
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-