The Secret Sentinel (Secret Service Operator #5, August-September 1936)
| First published | August 1936 |
|---|---|
| Type | Essay |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| August 1936 |
|
Secret Service Operator #5, August-September 1936 | Popular Publications, Inc. | MAGAZINE | 107 |