| Year | 1920 |
| Date | 05-Aug |
| Volume | 43 |
| Issue | 1,006 |
| Page | 111 |
| Category | Electronic |
| Part | |
| Title | Duplex Wireless Telephony: Some Experiments on its Application to Aircraft |
| Author | Captain P.P.Eckersley |
| Notes | Paper read before the Inst. E.E. 1. - Introduction. 2. - Automatic Duplex Wireless Telephony Systems |