Publications (5)
| Date | Publication | Publisher | Type | Page |
|---|---|---|---|---|
| June 1963 | Galaxy Magazine, June 1963 | Galaxy Publishing Corporation | MAGAZINE | 140 |
| September 1963 | Galaxy Magazine, September 1963 | Strato Publications | MAGAZINE | 140 |
| July 1986 | Mindspan | Baen Books | Collection | 101 |
| July 1986 | Mindspan | Baen Books | Collection | 101 |
| March 1993 | Mindspan | Baen Books | Collection | 101 |