Letter (Authentic Science Fiction Monthly, July 15, 1954): More Planets?
| First published | July 1954 |
|---|---|
| Type | Essay |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| July 1954 |
|
Authentic Science Fiction Monthly, July 15, 1954 | Hamilton & Co. | MAGAZINE | 137|137.1 |
| September 1954 |
|
Authentic Science Fiction Monthly, September 15, 1954 | Modern Distributors Ltd. | MAGAZINE | 137|137.1 |