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By: Prouse, C. Gordon - Derksen, Arthur J .Type: ArticleIn: The Canadian field-naturalistVolume: 88Series:Issue: 4Date: 1974Page Range: 481--481Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Derksen, Arthur J .Type: ArticleIn: The Canadian field-naturalistVolume: 103Series:Issue: 3Date: 1989Page Range: 429--431Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Campbell, Kenneth B. - Derksen, Arthur J . - Remnant, Richard A. - Stewart, Kenneth WType: ArticleIn: The Canadian field-naturalistVolume: 105Series:Issue: 4Date: 1991Page Range: 568--570Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects: