Silica Mound, Steamboat Springs. Near Virginia City, Western Nevada.

Chicago citation style
War Department. Office of the Chief of Engineers. U.S. Geological Exploration of the Fortieth Parallel. 1867-1881. Silica Mound, Steamboat Springs. Near Virginia City, Western Nevada.. 1867. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/519494. (Accessed June 25, 2018.)
APA citation style
War Department. Office of the Chief of Engineers. U.S. Geological Exploration of the Fortieth Parallel. 1867-1881, (1867) Silica Mound, Steamboat Springs. Near Virginia City, Western Nevada.. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/519494
MLA citation style
War Department. Office of the Chief of Engineers. U.S. Geological Exploration of the Fortieth Parallel. 1867-1881. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/519494>.
Note: These citations are programmatically generated and may be incomplete.