Publications (3)
| Date | Publication | Publisher | Type | Page |
|---|---|---|---|---|
| December 1960 | Galaxy Magazine, December 1960 | Galaxy Publishing Corporation | MAGAZINE | 172 |
| December 1960 | Galaxy Magazine, December 1960 | Strato Publications | MAGAZINE | 172 |
| 1964 | The Last Leap and Other Stories of the Super-Mind | Corgi | Collection | 122 |