The Worlds of Tomorrow: Mercury, World of Contrasts
| First published | April 1941 |
|---|---|
| Type | Short Fiction |
| Series | The Worlds of Tomorrow |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| April 1941 |
|
Captain Future, Spring 1941 | Better Publications, Inc. | MAGAZINE | 97 |
| August 1947 |
|
Hombres del Futuro #1, Agosto 1947 | Editorial El Tábano | MAGAZINE | |2 |
| August 2014 |
|
Captain Future, Spring 1941 | Adventure House | Anthology | 97 |