Rocky Mountain Fuel Company mining operations in Columbine, Colorado, circa 1910s
MLA
Denver Public Library. Western History Department. "Rocky Mountain Fuel Company mining operations in Columbine, Colorado, circa 1910s." Georgia State University. Special Collections. 1910/1919, http://digitalcollections.library.gsu.edu/cdm/ref/collection/mhross/id/101559.
APA
Denver Public Library. Western History Department (1910/1919). Rocky Mountain Fuel Company mining operations in Columbine, Colorado, circa 1910s. Retrieved from http://digitalcollections.library.gsu.edu/cdm/ref/collection/mhross/id/101559
Chicago
Denver Public Library. Western History Department. "Rocky Mountain Fuel Company mining operations in Columbine, Colorado, circa 1910s." 1910/1919. April 26, 2026. http://digitalcollections.library.gsu.edu/cdm/ref/collection/mhross/id/101559.
