For Your Information: The Demotion of Pluto
| First published | August 1956 |
|---|---|
| Type | Essay |
| Series | For Your Information |
Publications (2)
| Date | Publication | Publisher | Type | Page |
|---|---|---|---|---|
| August 1956 | Galaxy Science Fiction, August 1956 | Galaxy Publishing Corporation | MAGAZINE | 79 |
| October 1956 | Galaxy Science Fiction, No. 43 | Strato Publications | MAGAZINE | 67 |