Letter (Astounding, June 1938): Velocity of Light Is Not Absolute—But It Is Constant.
| First published | June 1938 |
|---|---|
| Type | Essay |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| June 1938 |
|
Astounding Science-Fiction, June 1938 | Street & Smith Publications, Inc. | MAGAZINE | 152|152.1 |