Revised version in The Far-Out People (1971) per that book's copyright page.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| August 1963 |
|
Galaxy Magazine, August 1963 | Galaxy Publishing Corporation | MAGAZINE | 46 |
| April 1964 |
|
Galaxy, #71 | Casa Editrice La Tribuna | MAGAZINE | 46 |
| July 1971 |
|
The Far-Out People: A Science Fiction Anthology | Signet / New American Library | Anthology | 102 |
| January 2016 | The Problem Makers | Project Gutenberg | Chapbook |