Letter (Astounding, December 1938): The Idea of Obtaining a Desired End by Altering the Past Had Not Been Used Before, and Was Not in "Legion of Time." The New Paper Costs More and Is Experimental.
| First published | December 1938 |
|---|---|
| Type | Essay |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| December 1938 |
|
Astounding Science-Fiction, December 1938 | Street & Smith Publications, Inc. | MAGAZINE | 160|160.1 |