| Year | 2005 |
| Date | 18-Feb |
| Volume | 194 |
| Issue | 4,241 |
| Page | 209 |
| Category | Electrical |
| Part | 4 |
| Title | Electro-Pneumatic Contactors |
| Author | Colin Beckwith |
| Notes | Describes coil winding, operating cylinder. Coil terminals, air connections and control terminals, actuating cylinder construction, cylinder block, cylinder liner |