| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| February 1924 |
|
Practical Electrics, February 1924 | Experimenter Publishing Company | MAGAZINE | 174 |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| February 1924 |
|
Practical Electrics, February 1924 | Experimenter Publishing Company | MAGAZINE | 174 |