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By: Webber, J M - Ball, Peter W. (Peter William),Type: ArticleIn: RhodoraVolume: 82Series:Issue:Date: 1980Page Range: 281--304Publication Info: [Cambridge, Mass., etc.] New England Botanical Club [etc.]Subjects:
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By: Webber, J M - McLeod, D. - Bobbette, R S WType: ArticleIn: The Canadian field-naturalistVolume: 99Series:Issue: 2Date: 1985Page Range: 141--146Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects: