The Unknown
| First published | July 1972 |
|---|---|
| Type | Short Fiction |
| Length | Novelette |
| Series | Federation of Humanity |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| July 1972 |
|
Amazing Science Fiction, July 1972 | Ultimate Publishing Co., Inc. | MAGAZINE | 6 |
| March 2005 |
|
Interstellar Patrol II: The Federation of Humanity | Baen Books | Collection | 63 |
| January 2007 |
|
Interstellar Patrol II: The Federation of Humanity | Baen Books | Collection | 85 |
| May 2007 |
|
The 1634: The Baltic War Disk | Baen Books | Omnibus | |19.204 |
| May 2007 | The 1634: The Baltic War Disk | Baen Books | Omnibus | |19.204 | |
| October 2010 | The 1635: The Eastern Front Disk | Baen Books | Omnibus | |22.204 |