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By: Ellis, Derek V. - Evans, JohnType: ArticleIn: The Canadian field-naturalistVolume: 74Series:Issue: 2Date: 1960Page Range: 59--70Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Ellis, Derek V.Type: ArticleIn: The Canadian field-naturalistVolume: 71Series:Issue: 1Date: 1957Page Range: 1--6Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects: