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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Van Zyll de Jong, C. G. - Campbell, D. C. - Merilees, William J.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 89
    Issue: 3
    Date: 1975
    Page Range: 322--323
    Publication Info: Ottawa Ottawa Field-Naturalists' Club