| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Toby & Character Jugs of the 20th Century & Their Makers: Companion Price Guide | 978-1-928938-02-6 (1-928938-02-7) | 2000 | Stephen M. Mullins |
| Toby & Character Jugs of the 20th Century and Their Makers | 978-1-928938-01-9 (1-928938-01-9) | 1999 | " |