Cartoon: "There's a man out here who says he has the secret of invisibility practically licked."
| First published | April 1941 |
|---|---|
| Type | Interior Art |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| April 1941 |
|
Amazing Stories, April 1941 | Ziff-Davis Publishing Company | MAGAZINE | 69 |