| Year | 2001 |
| Date | 23-Nov |
| Volume | 187 |
| Issue | 4,158 |
| Page | 442 |
| Category | Petrol Engine Topics |
| Part | |
| Title | Modern Developments in Engine Design |
| Author | Edgar T.Westbury |
| Notes | First published December 1st & 15th 1938. Reference to rotary-valve engines. Improvements in valve operation, types of rotary valve, special points and metallurgy about Aspin rotary-valve, timing of valve events, model rotary-valve engine? Other methods |