| Year | 1938 |
| Date | 23-Jun |
| Volume | 78 |
| Issue | 1,937 |
| Page | 588 |
| Category | Road Roller |
| Part | |
| Title | A Working Model I.C. Engine-Driven Road Roller |
| Author | Edgar T.Westbury |
| Notes | Exhaust-valve guide, longitudinal elevation of engine, camshaft, cams, camshaft-bracket, valve-rockers, forming bottom recess |