Second Approximation
| First published | September 1946 |
|---|---|
| Type | Essay |
Publications (1)
| Date | Publication | Publisher | Type | Page |
|---|---|---|---|---|
| September 1946 | Astounding Science Fiction, September 1946 | Street & Smith Publications, Inc. | MAGAZINE | 109 |
| First published | September 1946 |
|---|---|
| Type | Essay |
| Date | Publication | Publisher | Type | Page |
|---|---|---|---|---|
| September 1946 | Astounding Science Fiction, September 1946 | Street & Smith Publications, Inc. | MAGAZINE | 109 |