Trap Dyke, at Trinchera Pass of the Raton Mountain, Southern Colorado

Chicago citation style
Gardner, Alexander, 1821-1882. Trap Dyke, at Trinchera Pass of the Raton Mountain, Southern Colorado. 1867-1869. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/70796f173. (Accessed July 23, 2018.)
APA citation style
Gardner, Alexander, 1821-1882, (1867-1869) Trap Dyke, at Trinchera Pass of the Raton Mountain, Southern Colorado. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/70796f173
MLA citation style
Gardner, Alexander, 1821-1882. Retrieved from the Digital Public Library of America <http://ark.digitalcommonwealth.org/ark:/50959/70796f173>.
Note: These citations are programmatically generated and may be incomplete.