| Year | 1990 |
| Date | 19-Jan |
| Volume | 164 |
| Issue | 3,865 |
| Page | 110 |
| Category | Railway |
| Part | 18 |
| Title | Making Tracks. The Design, Construction and Maintenance of Ground Level Miniature Railways |
| Author | Dennis Monk |
| Notes | The tread, differential action, self-steering action, miniature profiles, 5 in. gauge tyre profiles |