| Year | 1928 |
| Date | 07-Jun |
| Volume | 58 |
| Issue | 1,413 |
| Page | 531 |
| Category | Internal Combustion |
| Part | 5 |
| Title | Designing and Building Model Internal Combustion Engines |
| Author | Edgar T.Westbury |
| Notes | Valves and Valve Gearing. Valve spring retaining devices, single cam valve mechanism, valve cage assembly, double-acting rocker and cam gear |