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By: Gordon, David M.Type: ArticleIn: The Canadian field-naturalistVolume: 104Series:Issue: 3Date: 1990Page Range: 347--353Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Gordon, David M.Type: ArticleIn: The Canadian field-naturalistVolume: 93Series:Issue: 2Date: 1979Page Range: 193--195Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Gordon, David M. - Cook, Francis R.Type: ArticleIn: The Canadian field-naturalistVolume: 94Series:Issue: 4Date: 1980Page Range: 456--457Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects: