| 其他書名 | Comprising the Counties of Erie, Crawford, Mercer, Venango, Warren, Forest, Clarion, McKean, Elk, Jefferson, Cameron and Clearfield |
| 出版 | Lewis Historical Publishing Company, 1943 |
| URL | http://books.google.com.hk/books?id=y7iDEN7dLT8C&hl=&source=gbs_api |