Cite

Central America Panama Railroad. Surveyed by Col. CW Hughes ...

MLA

Central America Panama Railroad. Surveyed by Col. CW Hughes ... Hydrographic Office of the Admiralty, 1849. https://collections.library.yale.edu/catalog/15822451.

APA, 6th edition

Central America Panama Railroad. Surveyed by Col. CW Hughes ... (1849). [Maps]. Hydrographic Office of the Admiralty, https://collections.library.yale.edu/catalog/15822451.