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By: Walters, Eric L - Miller, Edward HType: ArticleIn: The Canadian field-naturalistVolume: 115Series:Issue: 3Date: 2001Page Range: 413--419Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Koenig, Walter D, - Walters, Eric L - Pearse, Ian S - Carmen, William J - Knops, Johannes M HType: ArticleIn: Madroño; a West American journal of botanyVolume: 61Series:Issue:Date: 2014Page Range: 151--158Publication Info: Berkeley California Botanical SocietySubjects:
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By: Baird, Robin William - Walters, Eric L - Stacey, Pam JoyceType: ArticleIn: The Canadian field-naturalistVolume: 107Series:Issue: 4Date: 1993Page Range: 466--480Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects: