The Improved American Union Railroad map of the United States, British provinces, West Indies, Mexico and Central America.
MLA
Company, George F. Cram. The Improved American Union Railroad Map of the United States, British Provinces, West Indies, Mexico and Central America. Geo. F. Cram, 1873. https://collections.library.yale.edu/catalog/15536533.
APA, 6th edition
Company, G. F. C. (1873). The Improved American Union Railroad map of the United States, British provinces, West Indies, Mexico and Central America. [Maps]. Geo. F. Cram, https://collections.library.yale.edu/catalog/15536533.
