According to one editor, this story is completely different from the 1943 story of the same name published in Astounding. DO NOT MERGE these records unless you can confirm by direct examination that they're the same story.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1974 |
|
Future Kin | Doubleday | Anthology | 5 |
| May 1975 |
|
Urania #670 | Mondadori | MAGAZINE | 4 |
| 1976 |
|
Reise in die Unendlichkeit | Boje | Anthology | |
| 1980 |
|
Reise in die Unendlichkeit | Pelikan | Anthology | 45 |