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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Dirschl, Herman J. - Canadian Wildlife Service.
    Publication info: Ottawa, Information Canada, 1972
    Holding Institution: University of Alberta Library
  1. By: Dirschl, Herman J. - Dabbs, Donald H.,
    Type: Article
    In: The Canadian field-naturalist
    Volume: 83
    Issue: 3
    Date: 1969
    Page Range: 212--228
    Publication Info: Ottawa Ottawa Field-Naturalists' Club