| Year | 1967 |
| Date | 03-Feb |
| Volume | 133 |
| Issue | 3,314 |
| Page | 111 |
| Category | Internal Combustion |
| Part | 6 |
| Title | Four-Stroke Petrol-Engines |
| Author | Edgar T.Westbury |
| Notes | A review of progress in pre- and post-war years. The Centaur engine, Walruss 50 c.c. flat-four, services "power-pack", carburation problems, inexhaustible variety, road roller, Dolphin engine oil pump |