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By: Hoffmeister, Donald Frederick, - Mohr, Carl Otto,Edition:Publication info: Urbana, Natural History Survey Division, 1957Volume: Manual no.4 (1957)Series:Holding Institution: University Library, University of Illinois Urbana ChampaignSubjects:BHL Collections:
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By: Mohr, Carl Otto,Type: ArticleIn: The Canadian field-naturalistVolume: 79Series:Issue: 3Date: 1965Page Range: 162--171Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects: