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  1. By: Montana Bird Distribution Committee. - Cilimburg, Amy. - Currier, Coburn, - Ellis, Janet. - Hendricks, Paul. - Lenard, Susan. - Maxell, Bryce A. (Alan) - Story, Scott. - Sullivan, Dan. - Wightman, Catherine S. - Montana Audubon. - Montana Natural Heritage Program. - Montana. Department of Fish, Wildlife, and Parks
    Edition: 7th ed.
    Publication info: Helena :Montana Natural Heritage Program,2012
    Holding Institution: Montana State Library (archive.org)
  1. By: Wightman, Catherine S. - Fuller, Mark R
    Type: Article
    In: The Wilson bulletin.
    Volume: 117
    Issue: 3
    Date: 2005
    Page Range: 226--236
    Publication Info: Columbus, Ohio :Wilson Ornithological Society,1894-