For Your Information: Mutant of the Iron Horse
| First published | June 1956 |
|---|---|
| Type | Essay |
| Series | For Your Information |
Publications (2)
| Date | Publication | Publisher | Type | Page |
|---|---|---|---|---|
| June 1956 | Galaxy Science Fiction, June 1956 | Galaxy Publishing Corporation | MAGAZINE | 49 |
| August 1956 | Galaxy Science Fiction, No. 41 | Strato Publications | MAGAZINE | 81 |