Under Observation (Captain Future, Fall 1940)
| First published | October 1940 |
|---|---|
| Type | Essay |
| Series | Under Observation |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| October 1940 |
|
Captain Future, Fall 1940 | Better Publications, Inc. | MAGAZINE | 121 |
| July 2018 |
|
Captain Future, Fall 1940 | Adventure House | Anthology | 121 |