Cite

Bacon's steel plate map of America : political, historical & military.

MLA

Bacon, G. W., and Co. Bacon's Steel Plate Map of America : Political, Historical & Military. Bacon & Co., 0AD. https://collections.library.yale.edu/catalog/15536515.

APA, 6th edition

Bacon, G. W., & C. (0 C.E.). Bacon's steel plate map of America : political, historical & military. [Maps]. Bacon & Co., https://collections.library.yale.edu/catalog/15536515.