Letter (Astounding Stories, May 1935): Mr. van Kampen Says:
| First published | May 1935 |
|---|---|
| Type | Essay |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| May 1935 |
|
Astounding Stories, May 1935 | Street & Smith Publications, Inc. | MAGAZINE | 155 |