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By: Fenton, M. Brock (Melville Brockett), - Van Zyll de Jong, C. G. - Bell, G. P. - Campbell, David B. - Laplante, M.Type: ArticleIn: The Canadian field-naturalistVolume: 94Series:Issue: 4Date: 1980Page Range: 416--420Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects: