| Year | 1920 |
| Date | 05-Feb |
| Volume | 42 |
| Issue | 980 |
| Page | 137 |
| Category | General |
| Part | |
| Title | Mechanical Road Traction |
| Author | C.G.Conradi |
| Notes | Trailers, semi-trailers, Sentinel, Bristol Wagon Co., automatic coupler, tractor with knox semi-trailer, Lloyd electric tractor, Thornycroft Indian type lorry, devices for quick loading & unloading, experimental Caterpillar tractor, later type |