The Day They Found Out
| First published | December 1964 |
|---|---|
| Type | Short Fiction |
| Length | Short Story |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| December 1964 |
|
Amazing Stories, December 1964 | Ziff-Davis Publishing Company | MAGAZINE | 117 |
| June 1966 |
|
Urania #438 | Mondadori | MAGAZINE | 81 |
| 1967 |
|
Anticipación, #3 | Ferma | MAGAZINE | 4 |