Letter (Astounding, December 1938): Willy Ley Says That the Concentric Feed System Mentioned Was Suggested to Him by Carver.
| First published | December 1938 |
|---|---|
| Type | Essay |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| December 1938 |
|
Astounding Science-Fiction, December 1938 | Street & Smith Publications, Inc. | MAGAZINE | 156|156.2 |