| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| July 1969 |
|
Analog Science Fiction/Science Fact, July 1969 | Condé Nast | MAGAZINE | 56 |
| July 2009 |
|
A Sense of Infinity | Baen Books | Collection | 493 |
| July 2009 |
|
A Sense of Infinity | Baen Books | Collection |