| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1998 | 978-0-9533692-0-1 | Griff R. Jones | Hafodlas Slate Quarry, Bettws-y-Coed |
| 2002 | 978-0-9533692-1-8 | Griff R Jones | The rock cannon of Gwynedd |
| 2005 | 978-0-9533692-2-5 | Griff R JONES | Rhiwbach Slate Quarry: Its History and Development |