External Links
Publications (4)
| Date | Publication | Publisher | Type | Page |
|---|---|---|---|---|
| December 1955 | Astounding Science Fiction, December 1955 | Street & Smith Publications, Inc. | MAGAZINE | 59 |
| May 1956 | Astounding Science Fiction, May 1956 | Atlas Publishing and Distribution Co. Ltd | MAGAZINE | 38 |
| November 2007 | Breakaway | Project Gutenberg | Chapbook | |
| June 2009 | Short Science Fiction Collection 18 | LibriVox | Anthology | |2 |