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  1. Globally significant plants in southeastern Big Horn and southwestern Rosebud counties, Montana /
    By: Barton, Drake. - Crispin, Sue. - Montana Natural Heritage Program.
    Publication info: Helena, Mont. :Montana Natural Heritage Program,c2003.
    Holding Institution: Montana State Library (archive.org)
    View Book
  2. Sensitive plant species in weed management areas on the Helena National Forest: final report /
    By: Barton, Drake. - Crispin, Sue. - Montana Natural Heritage Program.
    Publication info: Helena, Mont. :Montana Natural Heritage Program,c2002.
    Holding Institution: Montana State Library (archive.org)
    View Book