United States. Forest Service. Work of the United States Forest Service.. Washington D.C.. UNT Digital Library. http://digital.library.unt.edu/ark:/67531/metadc5966/. Accessed June 25, 2016.
Note: Inconsistencies in capitalization and punctuation within the Digital Library may affect this citation. Before using this citation in formal writing, please consult your preferred style manual. More information.