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By: Thompson, W. P.Type: ArticleIn: The Canadian field-naturalistVolume: 35Series:Issue: 4Date: 1921-04Page Range: 74--75Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Thompson, W. P.Type: ArticleIn: Annals of botanyVolume: 37Series:Issue:Date: 1923-04Page Range: 183--192Publication Info: London, Academic Press [etc.],Subjects: