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  1. By: Salter, Richard E. - Gollup, Michael A. - Johnson, Stephen R. - Koski, William R. - Tull, C. Eric
    Type: Article
    In: The Canadian field-naturalist
    Volume: 94
    Issue: 3
    Date: 1980
    Page Range: 219--238
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Nettleship, David N. - Tull, C. Eric
    Type: Article
    In: The Canadian field-naturalist
    Volume: 84
    Issue: 4
    Date: 1970
    Page Range: 369--376
    Publication Info: Ottawa Ottawa Field-Naturalists' Club