Letter (Authentic Science Fiction Monthly, February 15, 1953): Gravity
| First published | February 1953 |
|---|---|
| Type | Essay |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| February 1953 |
|
Authentic Science Fiction Monthly, February 15, 1953 | Hamilton & Co. | MAGAZINE | 141|141.1 |