| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| June 1958 |
|
Galaxy Science Fiction, June 1958 | Galaxy Publishing Corporation | MAGAZINE | 105 |
| August 1958 |
|
Galaxy Science Fiction, No. 65 | Strato Publications | MAGAZINE | 89 |
| March 2016 | Perfect Answer | Project Gutenberg | Chapbook |