Publications (5)
| Date | Publication | Publisher | Type | Page |
|---|---|---|---|---|
| September 1952 | Galaxy Science Fiction, September 1952 | Galaxy Publishing Corporation | MAGAZINE | 136 |
| February 1953 | Galaxy Science Fiction, Vol. 3 No. 2 | Thorpe & Porter | MAGAZINE | 136 |
| September 2002 | Eternal Frontier | Baen Books | Collection | 243 |
| September 2002 | Eternal Frontier | Baen Books | Collection | |
| March 2004 | Eternal Frontier | Baen Books | Collection | 326 |