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  1. By: DeVelice, Robert L. - Montana Natural Heritage Program. - United States. Billings District Office. - United States. Bureau of Land Management. Billings District Office.
    Publication info: Helena, Mt. :Montana Natural Heritage Program,[1992]
    Holding Institution: Montana State Library (archive.org)
  2. By: Lesica, Peter. - Montana Natural Heritage Program. - United States. Billings District Office. - United States. Bureau of Land Management. Billings District Office.
    Publication info: Helena :Montana Natural Heritage Program,[1998].
    Holding Institution: Montana State Library (archive.org)