Publications (6)
| Date | Publication | Publisher | Type | Page |
|---|---|---|---|---|
| October 1957 | Astounding Science Fiction, October 1957 | Street & Smith Publications, Inc. | MAGAZINE | 58 |
| February 1958 | Astounding Science Fiction, February 1958 | Atlas Publishing and Distribution Co. Ltd | MAGAZINE | 50 |
| August 2007 | The Trouble with Humans | Baen Books | Collection | 149 |
| August 2007 | The Trouble with Humans | Baen Books | Collection | |149 |
| January 2010 | The Trouble with Humans | Baen Books | Collection | 205 |
| October 2010 | The 1635: The Eastern Front Disk | Baen Books | Omnibus | |26.07 |