| Year | 1998 |
| Date | 20-Nov |
| Volume | 181 |
| Issue | 4,081 |
| Page | 613 |
| Category | Post Bag |
| Part | |
| Title | Optical head alignment (Second thoughts (Optical Head Alignment for the Dore-Westbury Milling Machine), Patrick Verschoyle) |
| Author | Hugh Wynnne Williams |
| Notes | See 141 3512 452 |