| Year | 1921 |
| Date | 21-Jul |
| Volume | 45 |
| Issue | 1,056 |
| Page | 56 |
| Category | Radio Engineering |
| Part | |
| Title | Latest Wireless Information |
| Author | |
| Notes | Amateur Wireless Transmission and Jamming. Imperial Wireless Chain. World Service Exhibition. New American C.W. Station |