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  1. By: Marliave, Jeffrey Burton - Frid, Alejandro - Welch, David W. - Porter, Aswea D.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 127
    Issue: 3
    Date: 2013-12-03
    Page Range: 255--261
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Welch, David W.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 109
    Issue: 4
    Date: 1995
    Page Range: 479--479
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Welch, David W. - Till, J. N.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 110
    Issue: 2
    Date: 1996
    Page Range: 332--334
    Publication Info: Ottawa Ottawa Field-Naturalists' Club