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  1. By: Verspoor, Eric,
    Type: Article
    In: The Canadian field-naturalist
    Volume: 97
    Issue: 1
    Date: 1983
    Page Range: 114--114
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Adams, C. E. - Burrows, Andy - Thompson, C. - Verspoor, Eric,
    Type: Article
    In: The Glasgow naturalist
    Volume: 26
    Issue: 1
    Date: 2014
    Page Range: 75--81
    Publication Info: Glasgow, Glasgow Natural History Society,