| Year | 1933 |
| Date | 06-Apr |
| Volume | 68 |
| Issue | 1,665 |
| Page | 319 |
| Category | Petrol Engine Topics |
| Part | |
| Title | Valve Operation |
| Author | Edgar T.Westbury |
| Notes | Camshaft layout, cam followers, vertical camshaft operating both valves from a single face cam, push rods, the overhead camshaft, valves operated by long rocking beams, other camshaft arrangements |