| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| February 1961 |
|
Galaxy Magazine, February 1961 | Galaxy Publishing Corporation | MAGAZINE | 21 |
| February 1961 |
|
Galaxy Magazine, February 1961 | Strato Publications | MAGAZINE | 21 |
| April 2016 | Sentry of the Sky | Project Gutenberg | Chapbook |