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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Snyder, L. L. (Lester Lynne), - Lapworth, E. D.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 67
    Issue: 4
    Date: 1953
    Page Range: 143--147
    Publication Info: Ottawa Ottawa Field-Naturalists' Club