Publications (5)
| Date | Publication | Publisher | Type | Page |
|---|---|---|---|---|
| April 1960 | The Magazine of Fantasy and Science Fiction, April 1960 | Mercury Press, Inc. | MAGAZINE | 103 |
| October 1960 | The Magazine of Fantasy and Science Fiction, October 1960 | Atlas Publishing and Distribution Co. Ltd | MAGAZINE | 2 |
| July 1985 | Forward! | Baen Books | Collection | 205 |
| July 1985 | Forward! | Baen Books | Collection | 205 |
| December 2003 | The Human Edge | Baen Books | Collection | 175 |