| GMD | BOOK |
| Classification | B EDI |
| Publisher | Exley Publications |
| Subject | Applied PhysicsBiographyCommunicationElectricityEnglishInventors/InventionsLightThe TelegraphThe Telephone |
| Topic | Non Fiction |
| Series | Scientists Who Have Changed the World |
| Description | Thin hb 8.5 x 6 |
| ISBN | 1850152012 |