Elements of geology

Chicago citation style
Gray, Alonzo, 1808-1860. Elements of geology. 1860. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/007936187. (Accessed June 4, 2020.)
APA citation style
Gray, Alonzo, 1808-1860, (1860) Elements of geology. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/007936187
MLA citation style
Gray, Alonzo, 1808-1860. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/007936187>.
Note: These citations are programmatically generated and may be incomplete.