Olson, J. C., & Hedlund, D. C. (1981). Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado. United States Department of the Interior, Geological Survey.
Chicago Style (17th ed.) CitationOlson, J. C., and David Carl Hedlund. Alkalic Rocks and Resources of Thorium and Associated Elements in the Powderhorn District, Gunnison County, Colorado. Washington: United States Department of the Interior, Geological Survey, 1981.
MLA (9th ed.) CitationOlson, J. C., and David Carl Hedlund. Alkalic Rocks and Resources of Thorium and Associated Elements in the Powderhorn District, Gunnison County, Colorado. United States Department of the Interior, Geological Survey, 1981.
Warning: These citations may not always be 100% accurate.