R. A. ยท R. Ashworth
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Greetings from Pittsburgh: A Picture Postcard History | 978-1-879511-45-3 (1-879511-45-2) | 2000 |
| Greetings from Pittsburgh: A Picture Postcard History | 978-0-911572-98-8 (0-911572-98-8) | 1900 |