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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Smoliak, S. - Holt, Neal William. - Willms, W. D. (Walter David), - Canada. Agriculture Canada
    Edition: Rev. 1990.
    Publication info: [Ottawa], Agriculture Canada, 1990
    Holding Institution: Agriculture and Agri-Food Canada (AAFC)
  1. By: Bork, Edward W. - Adams, Barry W. - Willms, W. D. (Walter David),
    Type: Article
    In: The Canadian field-naturalist
    Volume: 116
    Issue: 1
    Date: 2002
    Page Range: 51--59
    Publication Info: Ottawa Ottawa Field-Naturalists' Club