| Year | 1920 |
| Date | 26-Aug |
| Volume | 43 |
| Issue | 1,009 |
| Page | 163 |
| Category | Railway |
| Part | |
| Title | Railway Signalling Systems |
| Author | F.Raynar Wilson |
| Notes | Victorian Government Railways. Chapter 8. - Alternating Current Signalling. A.C. galvanometer relay, electric signal machine - low voltage D.C., wiring for distant motor, A.C. lamp signal, wiring diagram A.C. track & signals, wiring of lamp signal, flux neutraliser, impedance bonds |