Charts, etc

Chicago citation style
United States, Hydrographic Office. Charts, etc. 1938. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/4m90fj43n. (Accessed July 17, 2018.)
APA citation style
United States, Hydrographic Office, (1938) Charts, etc. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/4m90fj43n
MLA citation style
United States, Hydrographic Office. Retrieved from the Digital Public Library of America <http://ark.digitalcommonwealth.org/ark:/50959/4m90fj43n>.
Note: These citations are programmatically generated and may be incomplete.