| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Pennsylvania's Forbes Trail: Gateways and Getaways along the Legendary Route from Philadelphia to Pittsburgh | 978-1-58979-388-O (1-58979-388-9) | 2008 | Christine H. O¹Toole · R. Scott Stephenson |