John D. Clark, (Ph.D.)
Pseudonym of John D. Clark, Ph.D.
1 work in English-language magazines
| Date | Page | Type | Title | Magazine |
|---|---|---|---|---|
| February 1938 | 147|147.1 | Essay | Letter (Astounding Stories, February 1938): Future Evolution. | Astounding Stories, February 1938 |
Pseudonym of John D. Clark, Ph.D.
1 work in English-language magazines
| Date | Page | Type | Title | Magazine |
|---|---|---|---|---|
| February 1938 | 147|147.1 | Essay | Letter (Astounding Stories, February 1938): Future Evolution. | Astounding Stories, February 1938 |