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  1. By: Wormington, Alan - Leach, J. H.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 106
    Issue: 3
    Date: 1992
    Page Range: 376--380
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Crossman, E. J. - Leach, J. H.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 93
    Issue: 2
    Date: 1979
    Page Range: 179--180
    Publication Info: Ottawa Ottawa Field-Naturalists' Club