Cite This Item
MLA
Hitchcock, Charles H. (Charles Henry). Geological map of the United States. Washington, D.C: G.P.O., 1872. Web. 23 Apr 2024. <https://ark.digitalcommonwealth.org/ark:/50959/7h149x508>.
APA
Hitchcock, C. (1872). Geological map of the United States [Map]. Retrieved from https://ark.digitalcommonwealth.org/ark:/50959/7h149x508
Chicago
Hitchcock, Charles H. (Charles Henry). "Geological map of the United States." Map. Washington, D.C: G.P.O., 1872. Digital Commonwealth, https://ark.digitalcommonwealth.org/ark:/50959/7h149x508 (accessed April 23, 2024).