| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| February 1936 |
|
Secret Agent X, February 1936 | Periodical House | MAGAZINE | |
| 1980 |
|
Secret Agent-X: A History | Robert Weinberg | Nonfiction | 96 |
| 1990 | Secret Agent-X | Golden Perils Press & Fading Shadows | Nonfiction | ||
| July 2001 |
|
High Adventure, #59 July 2001 | Adventure House | MAGAZINE |