United States. Bureau of Land Management. Billings Field Office. (2013). Draft Billings and Pompeys Pillar National Monument resource management plan and environmental impact statement. U.S. Department of the Interior, Bureau of Land Management, Billings Field Office, Montana.
Chicago Style (17th ed.) CitationUnited States. Bureau of Land Management. Billings Field Office. Draft Billings and Pompeys Pillar National Monument Resource Management Plan and Environmental Impact Statement. [Billings, Montana]: U.S. Department of the Interior, Bureau of Land Management, Billings Field Office, Montana, 2013.
MLA (9th ed.) CitationUnited States. Bureau of Land Management. Billings Field Office. Draft Billings and Pompeys Pillar National Monument Resource Management Plan and Environmental Impact Statement. U.S. Department of the Interior, Bureau of Land Management, Billings Field Office, Montana, 2013.