Allsman, Paul T. _Reconnaissance of Gold Mining Districts in the Black
Hills, South Dakota._ U.S. Bureau of Mines, No. 427. Washington,
D. C.: U.S. Dept. of Interior, 1940.
Baldwin, G. P., editor. _The Black Hills Illustrated._ Philadelphia:
Baldwin Syndicate, 1904.
Carpenter, F. R. _The Mineral Resources of the Black Hills._ South
Dakota School of Mines Preliminary Report, No. 1. Rapid City:
South Dakota School of Mines, 1888.
Casey, Robert J. _The Black Hills._ New York: Bobbs-Merrill Co., 1949.
Dick, Everett. _Vanguards of the Frontier._ New York: D.
Appleton-Century Co., 1941.
Eloe, Frank. “Rushmore Cave,” _Black Hills Engineer_, XXIV (December,
1938), 274.
Fenton, C. L. “South Dakota’s Badlands,” _Nature Magazine_, XXIV
(August, 1941), 370-74.
Glasscock, C. B. _The Big Bonanza._ Indianapolis: Bobbs-Merrill Co.,
1931.
Hans, Fred. _The Great Sioux Nation._ Chicago: Donahue, 1907.
Hayden, F. V. and Meek, F. B. “Remarks on Geology of the Black Hills,”
_Academy of Natural Science Proceedings._ Philadelphia: Academy of
Natural Science, 1858, X, 41-59.
Hough, Emerson. _The Passing of the Frontier._ New Haven: Yale
University Press, 1921.
Kingsbury, G. W. _History of Dakota Territory._ Chicago: The S. J.
Clarke Co., 1915.
Lake, Stuart. _Wyatt Earp._ Boston: Houghton Mifflin, 1931.
Mirsky, Jeannette. _The Westward Crossings._ New York: Alfred A. Knopf,
1946.
Newton, Henry. _Geology of the Black Hills._ Washington, D. C.: United
States Geographical and Geological Survey, 1880.
O’Harra, C. C. “The Gold Mining Industry of the Black Hills,” _Black
Hills Engineer_, XIX (January, 1931), 3-9.
——. _The White River Badlands._ Department of Geology, No. 13. Rapid
City: South Dakota School of Mines, 1920.
Rothrach, E. P. _A Hydrologic Study of the White River Valley. South
Dakota Geological Survey Report._ Vermillion, South Dakota:
University of South Dakota, February, 1942.
Todd, James Edward. _A Preliminary Report on the Geology of South
Dakota._ South Dakota Geological Survey, No. 1. Vermillion:
University of South Dakota, 1894.
Tullis, E. L. “The Geology of the Black Hills,” _Black Hills Engineer_,
XXV (April, 1939), 26-38.