Publications (5)
| Date | Publication | Publisher | Type | Page |
|---|---|---|---|---|
| March 1974 | Worlds of If, March-April 1974 | UPD Publishing Corporation | MAGAZINE | 6 |
| March 1974 | Worlds of If, March-April 1974 | Universal-Tandem Publishing Company Ltd. | MAGAZINE | 6 |
| September 2002 | Eternal Frontier | Baen Books | Collection | 110 |
| September 2002 | Eternal Frontier | Baen Books | Collection | |
| March 2004 | Eternal Frontier | Baen Books | Collection | 147 |