| Year | 1939 |
| Date | 30-Mar |
| Volume | 80 |
| Issue | 1,977 |
| Page | 380 |
| Category | Railway |
| Part | |
| Title | Electric Traction |
| Author | C.Baker |
| Notes | Concluding instalment, modern developments. Accelerating relay, the quest of model realism, trend of development in control equipment, Metadyne systems, current control, development of British electrifications, the scope for models |