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  1. By: Hoffmeister, Donald Frederick, - Mohr, Carl Otto,
    Publication info: Urbana, Natural History Survey Division, 1957
    Holding Institution: University Library, University of Illinois Urbana Champaign
  1. By: Mohr, Carl Otto,
    Type: Article
    In: The Canadian field-naturalist
    Volume: 79
    Issue: 3
    Date: 1965
    Page Range: 162--171
    Publication Info: Ottawa Ottawa Field-Naturalists' Club