[Map of the world on a polyconic projection]

Chicago citation style
[Map of the world on a polyconic projection]. 1850. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/x633f9782. (Accessed July 23, 2018.)
APA citation style
(1850) [Map of the world on a polyconic projection]. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/x633f9782
MLA citation style
Retrieved from the Digital Public Library of America <http://ark.digitalcommonwealth.org/ark:/50959/x633f9782>.
Note: These citations are programmatically generated and may be incomplete.