First published in Marvel Stories, April 1941.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| April 1941 |
|
Marvel Stories, April 1941 | Western Fiction Publishing Co. | MAGAZINE | 8 |
| January 1999 |
|
Gryphon Science Fiction and Fantasy Reader #1 | Gryphon Books | Anthology | 87 |
| August 2022 |
|
The Last Secret Weapon | Faded Page | Chapbook |