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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Graber, Richard R. (Richard Rex), - Graber, Jean W. (Jean Weber), - Kirk, Ethelyn L.
    Type: Issue
    In: Biological notes
    Volume: 86
    Date: 1974
    Page Range: 1-56
    Publication Info: Urbana Illinois Natural History Survey 1933-1988
    Subjects: Birds--Illinois  Flycatchers--Illinois  Tyrannidae--Illinois