Map showing the property and mines of the Pittsburgh Coal Company.
MLA
Map Showing the Property and Mines of the Pittsburgh Coal Company. John C. Rankin Co. , 1904. https://collections.library.yale.edu/catalog/15827680.
APA, 6th edition
Map showing the property and mines of the Pittsburgh Coal Company. (1904). [Maps]. John C. Rankin Co. , https://collections.library.yale.edu/catalog/15827680.