Isthmus of Darien from 77⁰20' to 80⁰10'. : Compiled at the U.S. Naval Observatory, from various authorities, including maps of 1764.
MLA
Isthmus of Darien from 77⁰20' to 80⁰10'. : Compiled at the U.S. Naval Observatory, from Various Authorities, Including Maps of 1764. Govt. Printing Office, 1867. https://collections.library.yale.edu/catalog/15822430.
APA, 6th edition
Isthmus of Darien from 77⁰20' to 80⁰10'. : Compiled at the U.S. Naval Observatory, from various authorities, including maps of 1764. (1867). [Maps]. Govt. Printing Office, https://collections.library.yale.edu/catalog/15822430.
