Letter (Captain Future, Summer 1940): Solar System Saver
| First published | July 1940 |
|---|---|
| Type | Essay |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| July 1940 |
|
Captain Future, Summer 1940 | Better Publications, Inc. | MAGAZINE | 6|6.2 |
| July 2009 |
|
The Collected Captain Future: Wizard of Science, Volume One | Haffner Press | Omnibus | 329|329.2 |