| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| July 1958 |
|
Galaxy Science Fiction, July 1958 | Galaxy Publishing Corporation | MAGAZINE | 41 |
| September 1958 |
|
Galaxy Science Fiction, No. 66 | Strato Publications | MAGAZINE | 39 |
| April 2016 | The Back of Our Heads | Project Gutenberg | Chapbook |