The Secret Sentinel (Secret Service Operator #5, June-July 1936)
| First published | June 1936 |
|---|---|
| Type | Essay |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| June 1936 |
|
Secret Service Operator #5, June-July 1936 | Popular Publications, Inc. | MAGAZINE | 105 |