Map exhibiting that portion of the state of Pennsylvania traversed by the surveys for a continous railroad from Harrisburg to Pittsburg, 1839-40.
MLA
Map Exhibiting That Portion of the State of Pennsylvania Traversed by the Surveys for a Continous Railroad from Harrisburg to Pittsburg, 1839-40. 0AD. https://collections.library.yale.edu/catalog/15811148.
APA, 6th edition
Map exhibiting that portion of the state of Pennsylvania traversed by the surveys for a continous railroad from Harrisburg to Pittsburg, 1839-40. (0 C.E.). [Maps]. https://collections.library.yale.edu/catalog/15811148.
