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  1. By: Twardek, William M.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 132
    Issue: 2
    Date: 2019-01-01
    Page Range: 199--200
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Lennox, Robert J. - Twardek, William M. - Cooke, Steven J.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 132
    Issue: 1
    Date: 2018-08-28
    Page Range: 61--66
    Publication Info: Ottawa Ottawa Field-Naturalists' Club